Dear aspirants below you can find the important and basicformulas for Speed, Distance and Time. Also you can check the formula for train and boat (upstream/ downstream) related questions. Mathematics paper of CDSE generally consist questions from algebra, arithmetic, mensuration, geometry, trigonometry, trigonometry, logarithm and statistics.

CDSE Speed Distance and Time Formula

CDSE Train Problems Formula

CDSE Boat and Stream Formula

CDSE Train and Boat Questions

Also Read

• CDSE Math Formula For Area, Volume And Surface Areas
• CDSE Math Formula of Number System
• CDSE Math Formula Of HCF and LCM

 About SSBCrack Editorial Team

The Editorial Team of SSBCrack consists of a group of Professional writers and aspirants. Their main aim is to provide up to date information regarding SSB Interviews and sharing quality information about Indian Defence to help aspirants. Mail us to join our editorial team now.

Dear aspirants below you can find the important and basic formulas for CDSE Area, Volume And Surface Areas. These formula will help you to solve most of the questions appear in CDSE math paper. Mathematics paper of CDSE generally consist questions from algebra, arithmetic, mensuration, geometry, trigonometry, trigonometry, logarithm and statistics.

CDSE Math Formula For Area

CDSE Math Formula For Volume

CDSE Math Formula For Surface Areas

CDSE Area, Volume And Surface Areas Questions

Also Read

• CDSE Maths Formula of Number System
• CDSE Maths Formula Of HCF and LCM

 About SSBCrack Editorial Team

The Editorial Team of SSBCrack consists of a group of Professional writers and aspirants. Their main aim is to provide up to date information regarding SSB Interviews and sharing quality information about Indian Defence to help aspirants. Mail us to join our editorial team now.

Dear aspirants below you can find most of the important and basic formulas from CDSE Number System. These formula will help you to solve most of the questions appear in CDSE maths paper. Mathematics paper of CDSE generally consist questions from algebra, arithmetic, mensuration, geometry, trigonometry, trigonometry, logarithm and statistics.

CDSE Maths Formulas Of Number System

• Ten is called the base of our number system.
• Set of Integers Z = {……-4, -3, -2, -1, 0, 1, 2, 3, 4 …….}
• Positive integers 1, 2, 3, 4, … are called natural numbers. Smallest natural number is 1 and there is no largest natural number. The set of natural numbers N is infinite.
• All natural numbers together with zero are whole numbers. 0 is the smallest whole number. The set of whole numbers W is infinite.
• Set of natural numbers is a subset of set of whole numbers, 0 being the exception
• Even numbers are divisible by 2 and the set of even numbers E includes 0. E={0, 2, 4, 6, …}.
• Odd numbers are not exactly divisible by 2. O = {1, 3, 5, 7….}
• Prime numbers are natural numbers having exact two distinct factors i.e. 1 and the number itself (2, 3, 5, 7, 11…). 2 is the smallest prime number. 
• Natural numbers having more than 2 factors are called composite number. E.g. 4, 6, 8, 9, 10, …
• 1 is neither prime nor composite. All even numbers except 2 are composite.
• Co-prime or relatively prime numbers are two natural numbers that may not be prime numbers and that have only 1 as common factor. E.g. 8 and 9, 15 and 16, 26 and 33.
• Pairs of prime numbers which have only one composite number between them are called twin primes. E.g. 3,5; 5,7; 11,13
• The numbers which can be expressed in the form of p/q, where p and q are integers and q is not 0, are called rational number. The set of rational numbers is denoted by Q.
• A number which cannot be expressed as terminating nor a non-terminating repeating decimal is called an irrational number.
• A pure recurring decimal is a decimal in which all the digits after the decimal point are repeated. Mixed recurring decimal is a decimal in which at least one digit after the decimal point is not repeated.
• Short cut method for converting pure recurring decimal to a rational number.
• Write the repeated digit or digits only once in the numerator and take as many nines in the denominator as there are repeating digits in the given number.
• For example, 0.33333 = 3/9 = 1/3 or 0.387387387 = 387/999
• Short cut method for converting mixed recurring decimal to a rational number
• Form a fraction in which the numerator is the difference between the number formed by all the digits after the decimal point taking the repeating digits only once and that formed by the digits which are not repeated and the denominator is the number formed by as many nines as there are repeated digits followed by as many zeros as there are non-repeated digits. e.g. 0.74353535 = 7435-74 / 9900 = 7361/9900 or 0.1272727 = 127 ? 1/990 = 7/55
• The sets of rational numbers and irrational numbers taken together are known as a set of real numbers. The absolute value of a real number |x| is defined as |x|= x, if x > 0 and |x|= -x, if x < 0

CDSE Questions From Number System

Also Check

• CDSE Maths Formula Of HCF and LCM
• CDSE Math Formula For Area, Volume And Surface Areas

 About SSBCrack Editorial Team

The Editorial Team of SSBCrack consists of a group of Professional writers and aspirants. Their main aim is to provide up to date information regarding SSB Interviews and sharing quality information about Indian Defence to help aspirants. Mail us to join our editorial team now.

Dear aspirants below you can find the important and basic formulas of CDSE HCF and LCM questions. These formula will help you to solve most of the questions appear in CDSE maths paper. Mathematics paper of CDSE generally consist questions from algebra, arithmetic, mensuration, geometry, trigonometry, trigonometry, logarithm and statistics. Below you can find CDSE questions from HCF and LCM with important formula. 

 CDSE Maths Formula on HCF and LCM

1. Factors and Multiples: If number a divided another number b exactly, we say that a is a factor of b. In this case, b is called a multiple of a.
2. Highest Common Factor (H.C.F.) or Greatest Common Measure (G.C.M.) or Greatest Common Divisor (G.C.D.): The H.C.F. of two or more than two numbers is the greatest number that divided each of them exactly.
• There are two methods of finding the H.C.F. of a given set of numbers: 
• Factorization Method: Express the each one of the given numbers as the product of prime factors. The product of least powers of common prime factors gives H.C.F.
• Division Method: Suppose we have to find the H.C.F. of two given numbers, divide the larger by the smaller one. Now, divide the divisor by the remainder. Repeat the process of dividing the preceding number by the remainder last obtained till zero is obtained as remainder. The last divisor is required H.C.F.
• Finding the H.C.F. of more than two numbers: Suppose we have to find the H.C.F. of three numbers, then, H.C.F. of [(H.C.F. of any two) and (the third number)] gives the H.C.F. of three given number.
• Similarly, the H.C.F. of more than three numbers may be obtained.
3. Least Common Multiple (L.C.M.): The least number which is exactly divisible by each one of the given numbers is called their L.C.M. There are two methods of finding the L.C.M. of a given set of numbers:
• Factorization Method: Resolve each one of the given numbers into a product of prime factors. Then, L.C.M. is the product of highest powers of all the factors.
• Division Method (short-cut): Arrange the given numbers in a rwo in any order. Divide by a number which divided exactly at least two of the given numbers and carry forward the numbers which are not divisible. Repeat the above process till no two of the numbers are divisible by the same number except 1. The product of the divisors and the undivided numbers is the required L.C.M. of the given numbers.
4. Product of two numbers = Product of their H.C.F. and L.C.M.
5. Co-primes: Two numbers are said to be co-primes if their H.C.F. is 1.
6. H.C.F. and L.C.M. of Fractions:
• H.C.F. =  H.C.F. of Numerators / L.C.M. of Denominators
• L.C.M. = L.C.M. of Numerators / H.C.F. of Denominators
7. H.C.F. and L.C.M. of Decimal Fractions:
• In a given numbers, make the same number of decimal places by annexing zeros in some numbers, if necessary. Considering these numbers without decimal point, find H.C.F. or L.C.M. as the case may be. Now, in the result, mark off as many decimal places as are there in each of the given numbers.
8. Comparison of Fractions:
• Find the L.C.M. of the denominators of the given fractions. Convert each of the fractions into an equivalent fraction with L.C.M as the denominator, by multiplying both the numerator and denominator by the same number. The resultant fraction with the greatest numerator is the greatest.

 About SSBCrack Editorial Team

The Editorial Team of SSBCrack consists of a group of Professional writers and aspirants. Their main aim is to provide up to date information regarding SSB Interviews and sharing quality information about Indian Defence to help aspirants. Mail us to join our editorial team now.

Today Indian army official website joinindianarmy.nic.in has posted some update on SSC-42 and SSCW- 13 tech entry, it is confusing for most of us because the message written over there is vague. Some candidates are getting confused regarding the list of shortlisted candidates for SSC 42 tech and SSCW-13 entry. Though, it will take sometime for Indian army to publish SSC 42 tech center allotment and SSB interview dates.

Check: SSC 42 Tech SSB Interview Date

SSC-42 and SSCW 13 Tech Updates by Indian Army Website

This list contains the name of 5000+ candidates with email ids respectively. Its should not be the list of shortlisted candidates because the number of candidates are very less, in TGC 118 we have around 18000+ shortlisted candidates ( excluding missing names).

These candidates might have some issues with their application form and need to revert back to Indian army email sent to them. So, there is nothing to worry about, the final list of shortlisted candidates is yet to come.

Candidates who are mentioned in this list do check their email and reply as per the instructions. Also, do share that e- mail with us if you get one.

• SSCW tech 13- list of names with anomalies in marks. Please act as per email sent. Check your name.
• SSC tech 42- list of names with anomalies in marks. Please act as per email sent. Check your name.

Also Read

• SSC 42 Tech SSB Interview Date
• TGC118 Eligible Branch and Cut Off
• TGC 118 SSB Interview Dates

 About SSBCrack Editorial Team

The Editorial Team of SSBCrack consists of a group of Professional writers and aspirants. Their main aim is to provide up to date information regarding SSB Interviews and sharing quality information about Indian Defence to help aspirants. Mail us to join our editorial team now.

Friends this is our new initiative to keep SSB aspirants updated, this time I have tried to collect information useful for us on Sports. So that before going to SSB we can get a review of all recent events in sports without turning back to newspaper pages. Here are famous Major Sporting Events Of July 2013.

Major Sporting Events Of July 2013

1. Asian athletics championship:-20th version of the game hosted in Pune, India. And India won 17 medals 2golds, 6 silvers and 9 bronze India ranked 6th in tournament, China was first, Bahrain 2nd and Japan stood third. Indian Vikas Gowda, a discus thrower won gold and in 4*400 meter relay Tintu Luka, Nirmala, Ana Mariyam Jose, R.M. Poovama won gold.
2. Wimbledon 2013:- Wimbledon is played on grass court; it was 127th edition of the tournament. In males Andy Murry of great Briton won title by defeating Serbia’s Novak Djokovic. In the Women’s Singles category of Wimbledon, Marion Bartoli of France on 6 July 2013 won her maiden Grand Slam by defeating Sabine lisicki of Germany.
3. Indian hockey coach:-Michael Nobbs, Coach of India’s men’s hockey team was sacked on 10 July 2013. Roelant Oltmans got charge of coach till replacement of Nobb is named. Hockey India (HI) on 10 July 2013 appointed Olympic gold medallist Maharaj Kishan Kaushik as the men’s hockey team coach. 
4. India- Sri Lanka-West Indies tri series:-India won the West Indies Tri-Nation Series by one wicket. The final was played between India and Sri Lanka at Queen’s Park Oval, Port of Spain.
5. Scottish Open 2013 GOLF: American Golfer Phil Mickelson won the title Phil Mickelson on 14 July 2013 won the Scottish Open title in a sudden-death play-off against South Africa’s Branden Grace.
6. Deepika Kumari, Laishram Bombayla Devi and Rimil Biruly won Gold Medal in Archery:-India on 21 July 2013 bagged a Gold medal in the Women’s Recurve Team event at Colombia. India finished at fourth Position in the Archery World Cup Stage 3India finished at fourth Position in the Archery World Cup Stage 3 on 21 July 2013 with Deepika Kumari winning gold and bronze medal.
7. Tour de France 2013 Chris Froome won 100th Edition of the Race:-Christopher Froome from Britain on 21 July 2013 has won the 100th edition of the Tour de France.
8. Devendra Jhajharia won Gold at IPC Athletics World Championships:-Devendra Jhajharia is the 1st differently-abled Indian to win gold at IPC Athletics World Championships. Earlier he Won gold at 2004 Summer Paralympics, Athens. He is a javelin thrower.
9. Lajja Goswami won Silver in shooting World Cup:-Lajja Goswami on 9 July 2013 won silver medal in women’s 50-metre Rifle 3 Position event at the ISSF World Cup in Granada, Spain.
10. World’s leading Sprinters Tyson Gay and Asafa Powell found Positive in Doping Test :-Two of the sport’s biggest names Tyson Gay and Asafa Powell had failed drugs tests and tested positive for an at an Out-of-competition test.
11. Boxing:- Indian boxers clinched 1 gold ,2 silver and 1 bronze in Asian boxing championship 2013,jordan Gold in56 kg by shiva thapa.devendro singh (49kg) and mandeep jangra (69kg) won silver medals.
12. Formula one:-German G.P. won by Sebastian Vettel of redbull. And British G.P. won by Mercedes nico roseberg.
13. Shane Warne to be inducted into the ICC Cricket Hall of Fame:-ICC on 11 July 2013 announced that Shane Warne would be inducted into the ICC cricket hall of fame.
14. Martina Hingis leads 2013 Tennis Hall of Fame class.

 Gaurav Vaishnav, Editorial Team

Gaurav is a defence aspirant and appeared for SSB interview 8 times, he is here to share his experience of different selection centres across India. Mail us to join our editorial team now.

Friends this is our new initiative to keep SSB aspirants updated, this time I have tried to collect information useful for us on national, international and sports. So that before going to SSB we can get a review of all recent events without turning back to newspaper pages. Here is famous National issues from July 2013.

1. Sujata singh India’s new foreign secretary: – Sujata Singh (envoy to Germany) is India’s new foreign secretary ,she took over from Ranjan Mathai .she is 1976 batch IFS officer, she was about to retire but her tenure is extended for two years.
2. India rejected snowden’s plea for asylum:-Edward Snowden is a former employee of CIA; he leaked details of top secret US and British govt. mass surveillance programs to press. US revoked his visa. He was stuck on Russian airport and applied to various countries including India to seek asylum. Finally Russia gave him temporary asylum for one year and he had left airport now.
3. 3 new cities get NCR status :-Jaipur got counter magnet area, NCR planning board  declared Jaipur  as counter magnet area and bharatpur (raj),mahendragarh and bhiwani both I hariyana total no. of NCR districts  is now 19.
4. FDI in telecom 100% :-govt raised limit of FDI in telecom sector to 100% from 74%.while investment up to 49% will be permitted under the automatic route, investment beyond that will need a green light from the foreign investment promotion board.
5. Food security bill cleared via ordinance by cabinet:-food security bill will give 5 kg of food grains for 67 % of population at rs1-3 per k.g. it includes rs.1, 24,000 crore expenditure. Beneficiary list is still not ready.(bill is also cleared in lok sabha now).
6. India Bhutan relation:-indo-Bhutan relation strained due to India’s withdrawal of all subsidy on cooking gas and kerocene.it resulted in double price of these items in Bhutan markets. After few days India reviewed this decision and resumed the subsidy to Bhutan. This move was influenced by Bhutan –Sino relations.
7. Serial blasts in bodh Gaya:-serial blasts rocked the bodh Gaya temple, Bihar as 10 serial blasts took place. In total 13 bomb were planted but 3 went fuse. Indian Mujahidin is suspected to have hands in blasts and as a result of this attack CISF security was extended to temple.
8. Jharkhand new govt: – congress and Jharkhand mukti morcha made govt in Jharkhand after 6 months of presidential rule. Last cm of BJP led govt was Arjun Munda. Now Hemant Soren son of JMM chief Shibu Soren as CM of Jharkhand.  Hemant is 9th cm in 13 years of Jharkhand existence.
9. Jhumpa Lahiri featured for Man Booker Prize 2013:-Indian American author Jhumpa Lahiri’s The Lowland has been listed among 13 novels longlisted for the Man Booker Prize 2013,for her book lowland.
10. India successfully launched its first Navigational Satellite IRNSS-1A:-India successfully launched its 1st dedicated navigation satellite, IRNSS-1A using PSLV. IRNSS-1A is the part of the seven satellites of the IRNSS satellites.
11. Women officers to be inducted in BSF for First Time:-The government for the first time in Month of July 2013 has given its nod for recruitment and commissioning of women officers in BSF.
12. Allahabad High Court put a Ban on Caste-based Rallies in UP:-The Allahabad high court on 10 July 2013 put a stay on caste-based rallies throughout Uttar Pradesh.
13. Person in Jail or Police Custody cannot Contest Elections: Supreme Court:-SC in its landmark Judgment barred people in Jail or Police Custody from contesting elections. This will help to clean the Parliament and State Assemblies.
14. National Aviation University to be Set up in Rae Bareli, UP:-The Union Cabinet of India on 11 July 2013 approved the proposal for setting up Rajiv Gandhi National Aviation University.
15. Union Defense Ministry launched a website on NCC:-www.nccindia.nic.in Website on NCC launched by Defense Ministry. The website is designed to provide information about NCC and will acts as an information data bank of its Cadets. The website was launched by Jitendra Singh, Minister of State for Defense.
16. Government made Photo Identity Mandatory for Purchase of Acid:-The Union government of India on 16 July 2013 proposed to make production of Photo identity card mandatory to curb the menace of acid attack, now acid will be treated as poison.
17. National Tobacco Control Campaign “Tears You Apart” Launched:-Ministry of Health & Family Welfare, Government of India launched the nationwide National Tobacco Control Campaign known as- Tears you apart.
18. Government approved creation of Strike Corps along China Border:-CCS approved the proposal of creation of Mountain Strike Corps along the entire LAC with China. This strike corps will be headquartered at Panagarh, WB.
19. Justice P. Sathasivam Sworn in as the Chief Justice of India:-The President of India on 19 July 2013 administered the oath of the office of Chief Justice of India (CJI) to Justice P. Sathasivam. He succeeded Justice Altamas Kabir who retired from the office of Chief Justice of India on 18 July 2013 after a short term of just nine months.
20. India’s Advanced Weather Satellite INSAT-3d Successfully Launched:-India’s Weather Satellite INSAT-3D was launched successfully on 26 July 2013 from Kourou, French Guiana.
21. Batla House Encounter convict Shahzad Ahmed got Life Sentence:-A trial court on 30 July 2013 awarded life term to Batla House encounter convict Shahzad Ahmed.
22. Malala Day observed across the World:-World observed Malala Day on 12 July. Indian girl, Razia Sultana won United Nations’ Special Envoy for Global Education’s Youth Courage Award for Education. She belongs to UP.

• International Issues And Events July 2013
• Major Sporting Events Of July 2013

 Gaurav Vaishnav, Editorial Team

Gaurav is a defence aspirant and appeared for SSB interview 8 times, he is here to share his experience of different selection centres across India. Mail us to join our editorial team now.