q19 Multiple Choice Questions

Option : B
Explanation : First,we will check the divisibility by 9. Sum of the digits of the given number 7 + 7 + 4+ 9+5+ 8+ $\fn_jvn \small _{N1}$ +9+6+ $\fn_jvn \small _{N2}$ = 55+ $\fn_jvn \small _{N1}$ + $\fn_jvn \small _{N2}$ By taking option one-by-on,e, we take 1. 55 + 7 + 8 = 70 is not divisible by 9. 2. 55 + 0 + 8 = 63 which is divisible by 9. Now, we will check the divisible by 8 For it, take last three digits 96 $\fn_jvn \small _{N2}$ =968 which is divisible by 8. Hence, the number 7749580968 is divisible by both. 8 and 9.