Factors and Multiples

List the first five multiples of 3. (No commas between answers but leave one space between each number).

What is the lowest common multiple of 2 and 5?

What is the missing value when we express 110 as a product of its primes: 110 = 2 x 5 x ?

What is the highest common factor for 32 and 48?

What is the highest common factor for 100 and 275?

What is the highest common factor for 12 and 30

What is the lowest common multiple of 35 and 15?

7 x 5 3 x 5

What number is missing when we express 224 as a product of its primes? 224 = 2 x 2 x 2 x 2 x 2 x ?

What is the lowest common multiple of 22 and 18?

Which of these shows 960 expressed as a product of its primes?

• $960\ =\ 2^6\ \times3\ \times5\$

• $960\ =\ 2^{5\ }\times5\ \times7$

• $960\ =\ 5^2\ \times2\ \times3$

• $960\ =\ 3^4\ \times7\ \times11$