Divisibility Rules 1

This quiz works through the divisibility rules in 12 questions, asking you to choose numbers that divide cleanly and to settle a few true-or-false claims.

Prompts such as Which number is divisible by 4? or Which number is divisible by 9? let you lean on quick checks instead of dividing the long way.

One handy pattern to know is the test for 9: add up all the digits, and if that sum divides by 9, the original number does too. The same trick works for 3, which makes those two among the easiest divisors to spot.

Recommended level: intermediate.