Question

can you say if 4 and 8 is divisible by 2978634?

Answer 1

no it can not divide because we get the answer in decimal

Answer 2

Divisibility rule of 4-
If the last two numbers are divisible by 4 then the whole number is divisible by four.
In this number the last 2 digits- 34 is not in the 4's table so its not divisible by 4.

Divisibility rule of 8- 
If the last three numbers are divisible by 8 then the whole number is divisible by eight.
In this number the 3 digits- 634 is not in the 8's table so its not divisible by 8.