Divisor 6009

To determine if any number is divisible by 6009, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 2003 - then it is divisible by 6009.

The following tests must pass:

• Test if a number is divisible by 3
• The "Dirk Franken Test" for Divisibility by 2003

Easy!