Divisor 9903

To determine if any number is divisible by 9903, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 3301 - then it is divisible by 9903.

The following tests must pass:

• Test if a number is divisible by 3
• The "Thomas Jones Test" for Divisibility by 3301

Easy!