RRB NTPC · Integer Divisibility Rules

Exercise and reference answers

Matching pairs

1. Left

   Divisible by 3 rule

   Right

   Sum of digits divisible by 3

2. Left

   Divisible by 4 rule

   Right

   Last two digits multiple of 4

3. Left

   Divisible by 5 rule

   Right

   Last digit is 0 or 5

4. Left

   Divisible by 2 rule

   Right

   Units digit is even

Instructions

Match each divisor to its divisibility test