Question

Question 2 (e)

Using divisibility test, determine whether the given number is divisible by 4; by 8:
12159

Answer 1

Divisibility rule for 4: A number with 3 or more digits is divisible by 4 if the number formed by its last two digits (i.e. ones and tens) is divisible by 4.
Divisibility rule for 8: A number with 4 or more digits is divisible by 8 if the number formed by the last three digits is divisible by 8.

Applying the above divisibility rules,
12159 $\to$ Not divisible by 4 and 8 as it is an odd number.