Numbers - General Aptitude

Q1:

If the number 97215 * 6 is completely divisible by 11, then the smallest whole number in place of * will be:

A 3

B 2

C 1

D 5

E None of these

ANS:A - 3

Given number = 97215x6 (6 + 5 + 2 + 9) - (x + 1 + 7) = (14 - x), which must be divisible by 11.   x = 3