Factors, Multiples, LCM, HCF

Which number has 215 as one of its multiples?

• 40

• 15

• 43

• 25

Tags

CCSS.4.OA.B.4

The Lowest Common Multiple (LCM) of 24 and 60 is:

• 90

• 120

• 30

• 10

The Highest Common Factor (HCF) of 48 and 64 is:

• 14

• 8

• 4

• 16

Express 60 as a product of its prime factors.

• $4\ \times\ 15$
  

• $2^3\ \times\ 3^2$

• $\sqrt{9}\ \times\ \sqrt{16}\ \times\ \sqrt{25}$

• $2^2\ \times\ 3\ \times\ 5$

• $3600^{\frac{1}{2}}$

Express 150 as a product of its prime factors.

• $6\ \times\ 25$

• $2\ \times\ 3\ \times\ 5^2$

• $5^2\ \times\ 7$

• $2^2\ \times\ 3^2\ \times\ 5$

• $22500^{\frac{1}{2}}$

Find the Highest Common Factor (HCF) of 60 and 150.

• 15

• 6

• 10

• 60

• 30

Express 72 as a product of its prime factors.

• $2^7$

• $3^{3\ }\ \times\ 2^2$

• $2^{3\ }\times\ 3^2$

• $2^2\ \times3^2\ \times\ 5$

• $2^2\ \times\ 3\ \times\ 7$

Find the Highest Common Factor (HCF) of 72 and 120.

• 6

• 12

• 16

• 24

• 36

Which of the following numbers is not a factor of 24?

• 6
• 8
• 3
• 7

Tags

CCSS.4.OA.B.4

Which lists all the factors of 15?

• 1, 7, 8, 15
• 1, 15
• 1, 3, 5, 15
• 3, 5, 15

Tags

CCSS.4.OA.B.4