# Blog

17,738 total views, 15 views today

17,738 total views, 15 views today Previous Question Next Question Why Matrix is Used? Addition of N Matrices Why Matrix is Used: We study matrices because all real data comes in the form of a matrix. […]

25,463 total views, 25 views today

25,463 total views, 25 views today Previous Question Next Question Why Matrix is Used? Addition of N Matrices Why Matrix is Used: We study matrices because all real data comes in the form of a matrix. […]

25,706 total views, 15 views today

25,706 total views, 15 views today Previous QuestionNext Question Calculating Covariance and Properties of Covariance Matrix. Covariance […]

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2,256 total views, no views today

3,344 total views, no views today

3,344 total views, no views today Previous QuestionNext Question What is the remainder when 496 is divided by 6 ? [CAT, 2003]a. 0 b. 2 c. 3 d. 4 [CAT, 2003] Solution: What is the remainder when 4 ^96 is divided by 6 Remainder: Let’s have another similar example to solve such type of problem to understand the mathematics of remainder. […]

3,658 total views, no views today

3,658 total views, no views today Previous QuestionNext Question If 92x-1- 81x-1= 1944, then x isa. 3 b. c. d. [CAT, 2017] Solution: If 92x-1- 81x-1= 1944, then x is : LHS = RHS (left hand side = right hand side)Firstly notice that we have the bases same which is 9 in each three terms […]

4,615 total views, no views today

4,615 total views, no views today Previous QuestionNext Question A sequence of 4 digits, when considered as a number in base 10 is four times the number it represents in base 6. What is the sum of the digits of the sequence?a. 7 b. 6 c. 9 d. 8 [CAT, 2016] Solution: A sequence of […]

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5,292 total views, no views today Previous QuestionNext Question What is the greatest power of 5 that divides 80! exactly.a. 15 b. 16 c. 19 d. 13 [CAT, 2016] Solution: What is the greatest power of 5 that divides 80! exactly: n! is called factorial n, or n factorial where n is a number. If n=4, then […]

3,614 total views, no views today

3,614 total views, no views today Previous QuestionNext Question If = 1 and -3+2 = 4n for every positive integer n, then a100 equalsa. 399-200 b. 399+200 c. 3100-200 d. 3100+200 [CAT, 2014] Solution: If a1=1 and a(n+1)-3an+2=4n for every positive integer n, then a100 equals: Given = 1 And – 3+2 = 4n Or = 3+4n-2 If […]

2,963 total views, no views today

2,963 total views, no views today Previous QuestionNext Question Suppose n is an integer, such that the sum of the digits of n is 2, and 1010 < n < 1011. The number of different values for n is:a. 11 b. 10 c. 9 d. 8 [CAT, 2014] Solution: Suppose n is an integer, such […]