Divisor 25563

To determine if any number is divisible by 25563, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 8521 - then it is divisible by 25563.

The following tests must pass:

• Test if a number is divisible by 3
• The "Alfie Griffin Test" for Divisibility by 8521

Easy!