Divisor 21992

To determine if any number is divisible by 21992, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 8 and 2749 - then it is divisible by 21992.

The following tests must pass:

• Test if a number is divisible by 8
• The "Alastair Cranston Test" for Divisibility by 2749

Easy!