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Level 21

Divisibility Rules


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2
the last digit is even
3
the sum of the digits is divisible by 3
4
the last two digits are divisible by 4
5
the last digit is 0 or 5
6
the number is divisible by both 2 AND 3
7
if the last digit is doubled and then subtracted from the entire number, the result is 0 or divisible by 7
8
the last three digits are divisible by 8
9
the sum of the digits is divisible by 9
10
the number ends in 0
11
if the sum of every second digit is taken and then subtracted from the entire number, the result is 0 or divisible by 11
12
the number is divisible by both 3 AND 4
when a number is divisible by another number
then it is also divisible by each of the factors of that number
e.g. if a number is divisible by 6
it is also divisible by 2 and 3
e.g. if a number is divisible by 12
it is also divisible by 2, 3, 4, and 6
Divisible by 2
The number ends in 2, 4, 6, 8, 0. Example; 3,462
Divisible by 3
The sum of digits in the number are divisible by 3; Example: 465 (4 + 6 + 5 = 15; 15/3 = 5)
Divisible by 4
The last two digits in the number are divisible by 4; Example: 358,924
Divisible by 5
The number ends in 0 or 5; Example: 3565 and 9530
Divisible by 6
The number is divisible by both 2 and 3. Example: 6354
Divisible by 8
The last 3 digits are divisible by 8; Example: 9,240
Divisible by 9
The sum of its digits is divisible by 9. Example: 315,423
Divisible by 10
The number ends in 0.