Mental Starter Kayla

Is 12 prime or composite?

• prime
• composite

What are all prime numbers divisible by?

• 1, 2, and itself
• 1 and itself
• Every number from 1-10
• They aren't divisable at all

Which list has only prime numbers?

• 2, 3, 4, 5
• 1, 5, 7, 9
• 2, 3, 5, 7
• 2, 4, 6, 8

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 120?

• 2, 3 and 5

• 2, 4 and 8

• 2 and 3 only

• 3, 5 and 6

Write 28 as a product of its prime factors.

• 2x2x7
• 4x7

Write 54 as a product of its prime factors.

• 2x2x3x3
• 2x3x3x3
• 2x3x9
• 6x9

Find the HCF of 20 and 24

• 6

• 4

• 5

• 12

Find the highest common factor of 36 and 84.

• 5

• 6

• 4

• 12

Find the LCM for 6, 18, and 36

• 6

• 18

• 36

• 108