Divisibility Rules Flashcards
1
Q
Divisible by 1
A
All numbers are divisible by 1
2
Q
Divisible by 2
A
The units digit is even
3
Q
Divisible by 3
A
Sum of all digits is divisible by 3
4
Q
Divisible by 4
A
Last two digits of a number together are divisible by 4 (includes 00)
5
Q
Divisible by 5
A
The units digit is 0 or 5
6
Q
Divisible by 6
A
The number is even AND the sum of the digits is a multiple of 3
7
Q
Divisible by 7
A
Out of luck. Do the division
8
Q
Divisible by 8
A
Divisible if there is no remainder after dividing the last three digits by 8
9
Q
Divisible by 9
A
Sum of the digits is divisible by 9
10
Q
Divisible by 10
A
The units digit is 0
11
Q
Divisible by 11
A
The sum of the odd digits minus the sum of the even digits is divisible by 11
12
Q
Divisible by 12
A
Divisible if the number is divisible by both 3 and 4
