Show that 52563744 is divisible by 24

Ans :
24=3X8 where 3 & 8 are co-prime.
Sum of digits = 5+2+5+6+3+7+4+4=36

36 is divisible by 3
So given number is divisible by 3

The number formed by last 3 digits = 744 is divisible by 8.
So given number is divisible by 8.

Hence number is divisible by (3X8) i.e. 24