factors and multiples

A prime number is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has only two factors.
  (1 and itself)

Which number is NOT prime?

• 3
• 7
• 17
• 21

Which number is a multiple of 12?

• 36
• 40
• 80
• 3

All the factors of 15 are:

• 1, 2, 3, 5, 13, 15 
• 1, 15
• 1, 6, 9, 15
• 1, 3, 5, 15

A number having more than two factors is called

• Prime

• Composite

• Factor

• Multiple

The smallest 2-digit prime number is

• 10

• 11

• 97

• 99

Which of the following number is divisible by 4?

• 932

• 810

• 414

• 638

The 4th multiple of 9 is

• 18

• 27

• 36

• 45

The second even multiple of 3 is

• 6

• 9

• 12

• 15

Which is a NOT a factor of 9?

• 0
• 1
• 3
• 9