Divisibility rules

Example: 2+(3×5)−62 + (3 \times 5) - 62+(3×5)−6 First: Multiply 3×5=153 \times 5 = 153×5=15 Then: 2+15−62 + 15 - 62+15−6 Then: 17−6=1117 - 6 = 1117−6=117: Double the last digit, subtract from the rest; result is divisible by 7. 8: Last three digits form a number divisible by 8. 9: Sum of digits is divisible by 9. 10: Last digit is 0. 11: Alternating sum of digits is divisible by 11. 12: Divisible by both 3 and 4. 14: Divisible by both 2 and 7. 15: Divisible by both 3 and 5