Number System — Divisibility Rules
- Formula / Rule
- Number System — Divisibility Rules
- Topic
- Number System
- Formula
Divisor Rule 2 Last digit is 0, 2, 4, 6, or 8 3 Sum of digits divisible by 3 4 Last two digits divisible by 4 5 Last digit is 0 or 5 6 Divisible by both 2 and 3 8 Last three digits divisible by 8 9 Sum of digits divisible by 9 10 Last digit is 0 11 (Sum of odd-position digits) − (Sum of even-position digits) = 0 or divisible by 11 - When to Use
- Quickly checking divisibility without full division.
- Worked Example
Q: Is 132 divisible by 11?
(1 + 2) − (3) = 3 − 3 = 0 → Yes, divisible by 11