ReefChong

Dozenal Divisibility Test Manual Divisor Tests 2: the last digit is 0, 2, 4, 6, 8 or X. 3: the last digit is 0, 3, 6 or 9. 4: the last digit is 0, 4 or 8. 6: the last digit is 0 or 6. Regular Tests 8: The second-last digit is even, the last digit is 0 or 8. The second-last digit is odd, the last digit is 4. 14: the last two digits are 00, 14, 28, 40, 54, 68, 80, 94 or X8. 28: The third-last digit is even, the last two digits are 00, 28, 54, 80 or X8. The third-last digit is odd, the last two digits are 14, 40, 68 or 94. If you think testing for 54 is worth the effort, the following three-digit numbers are to be memorised: 000, 054, 0X8, 14...