1.

Consider the number `N = 8 7 a 2 7 9 3 1 b` , where a , b are single digit whole numbers. Number of values of a + b for which N is divisible by 11 isA. `0`B. `1`C. `2`D. `3`

Answer» Correct Answer - C
Number of values …………
N is divisible by 11 if
`(b+3+7+a+8) - (1+9+2+7)=a+b-1` is divisible by 11
i.e. `a+b = 1 or 12`
`:.` number of values of `a + b` is 2.


Discussion

No Comment Found

Related InterviewSolutions