31/07/2025
The divisibility test for 3 is simple:
> 🔢 A number is divisible by 3 if the sum of its digits is divisible by 3.
✅ Examples:
123 → 1 + 2 + 3 = 6 → 6 is divisible by 3 → ✅ 123 is divisible by 3
456 → 4 + 5 + 6 = 15 → 15 is divisible by 3 → ✅ 456 is divisible by 3
742 → 7 + 4 + 2 = 13 → 13 is not divisible by 3 → ❌ 742 is not divisible by 3