Prime and Composite Numbers Review

Front

What are all prime numbers divisible by?

Back

1 and itself

Front

Prime numbers have:

Back

Exactly 2 factors

Front

Composite numbers

Back

Have more than 2 factors

Front

Simon (Mr. Lovett) completed 4 sets of chin-ups. Every set he reached a different prime number of chin-ups. What numbers could he have reached in each set? Options: 11, 13, 17, 19; 10, 11, 12, 13; 11, 14, 15, 17; 11, 15, 17, 19.

Back

11, 13, 17, 19

Front

Which number is NOT a factor of 10? Options: 1, 2, 3, 5

Back

3

Front

Which is a prime number? Options: 15, 17, 21, 39

Back

17

Front

Is 100 a prime or composite number?

Back

Composite

Front

Which of the following numbers shows all of the factors of 12? Options: 1,2,3,4,6,12, 1,2,3,4,6,8,12, 1,2,4,6,12, 2,4,6,8,10,12

Back

1,2,3,4,6,12

Front

Which of the following equations will NOT result in a multiple of 5? Options: 11 x 5 = _, 2 x 5 = _, 6 x 5 = _, 7 x 3 = _

Back

7 x 3 = _

Front

Factor

Back

"Factors" are the numbers you multiply to get another number. For instance, factors of 15 are 3 and 5, because 3×5 = 15