Divisibility Rules Practice
Check a number against the rules for 2 through 10.
Rules 2–10
- ÷2: YesEven last digit — Last digit is 0.
- ÷3: YesDigit sum divisible by 3 — Digit sum = 9.
- ÷4: YesLast two digits form a multiple of 4 — Last two digits = 20.
- ÷5: YesLast digit 0 or 5 — Last digit is 0.
- ÷6: YesDivisible by both 2 and 3 — Even? true. Digit sum ÷ 3? true.
- ÷7: YesDirect division check — 2520 ÷ 7 has no remainder.
- ÷8: YesLast three digits form a multiple of 8 — Last three digits = 520.
- ÷9: YesDigit sum divisible by 9 — Digit sum = 9.
- ÷10: YesLast digit 0 — Last digit is 0.
Formula
Rules for 2–10 (digit sums, last digits, and direct checks)
How it works
Each rule shows whether it passes and a short explanation of why.
Common wrong answer
Using only the last digit for 3 or 9 (you need the digit sum).