Divisibility Rules 2

Building on the basics, this quiz runs 11 questions on tougher divisors, including some "divisible by all of these except" prompts.

You might read Which number is divisible by 11? or The number 286 is divisible by 13., which pushes you past the easy single-digit tests.

The rule for 11 is the surprising one: you add and subtract the digits in an alternating pattern, and if that result divides by 11, so does the whole number. It feels like a magic trick the first time it works out.

Recommended level: intermediate to advanced.