Prime Factors

The prime factors of 36 are

• 2 and 3

• 2, 3 and 6

• 1, 2 and 3

• 2, 3, 6 and 12

What are the prime factors of 144?

• 2, 3 and 5

• 2, 4 and 8

• 2 and 3 only

• 3, 5 and 6

What are the prime factors of 120?

• 2, 3 and 5

• 2, 4 and 8

• 2 and 3 only

• 3, 5 and 6

What are the prime factors of 700?

• 2, 3 and 5

• 2 and 7 only

• 2, 5 and 7 only

• 3, 5 and 7

What are the prime factors of 390?

• 3 and 5

• 2, 3 and 5

• 2, 5 and 8

• 2, 3, 5 and 13

What are the prime factors of 240?

• 3 and 5

• 2, 3 and 5

• 2, 5 and 8

• 2, 3, 5 and 12

The prime factors of 132 are

• 2 and 3

• 2, 3 and 6

• 1, 2 and 3

• 2, 3, and 11

Which of the following sets of numbers consist of all prime numbers?

• 1, 2, 3 and 5

• 2, 3 and 8

• 2, 5, 7 and 10

• 5, 11, 13 and 17

Which of the following sets of numbers consist of all prime numbers?

• 4, 5 and 10

• 2, 13 and 5

• 12, 15, 27 and 30

• 5, 12, 13 and 27

Which of the following numbers have the same unique prime factors as 72?

• 100

• 6

• 10

• 20