Number Theory Flashcards
1
Q
Divisible by 2 test
A
Last digit divisible by 2
2
Q
Divisible by 3 test
A
Sum of digits divisible by 3
3
Q
Divisible by 4 test
A
Number formed by two final digits divisible by 4
4
Q
Divisible by 5 test
A
Last digit 0 or 5
5
Q
Divisible by 8 test
A
Number formed by final three digits divisible by 8
6
Q
Divisible by 9 test
A
Sum of digits divisible by 9
7
Q
Divisible by 11 test
A
Result of adding and subtracting digits in alternating order beginning at leftmost digit is divisible by 11
