Divisor 8403

To determine if any number is divisible by 8403, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 2801 - then it is divisible by 8403.

The following tests must pass:

• Test if a number is divisible by 3
• The "Ben Houghton Test" for Divisibility by 2801

Easy!