Question

If the number 517x324 is completely divisible by 3, then the smallest whole number in the place of x will be:

Answer 1

if sum all digits is divisable by 3 then total number is divisible by 3

5+1+7+3+2+4+x=22

Acc to substitution method;

if x=1:

5+1+7+3+2+4+1=23

if x=2:

5+1+7+3+2+4+1=24

x=2 is the smallest whole number to completely divide the number 517x324