# Blog

11,401 total views, 64 views today

11,401 total views, 64 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. […]

19,072 total views, 68 views today

19,072 total views, 68 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. […]

19,389 total views, 62 views today

19,389 total views, 62 views today Previous QuestionNext Question Calculating Covariance and Properties of Covariance Matrix. Covariance […]

2,169 total views, 1 views today

2,169 total views, 1 views today

3,241 total views, 1 views today

3,241 total views, 1 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. Firstly, […]

3,565 total views, 3 views today

3,565 total views, 3 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 (LHS […]

4,526 total views, 1 views today

4,526 total views, 1 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 4 […]

5,191 total views, 1 views today

5,191 total views, 1 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 4! […]

3,513 total views, 1 views today

3,513 total views, 1 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 n= […]

2,872 total views, 1 views today

2,872 total views, 1 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 that […]