Divisor 15685

To determine if any number is divisible by 15685, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 5 and 3137 - then it is divisible by 15685.

The following tests must pass:

• Test if a number is divisible by 5
• The "Natalie Gerratt Test" for Divisibility by 3137

Easy!