Practice A: Multiples and Factors

Find the 4th positive multiple of 14.

Will 40 be a common multiple of 10 and 4? Explain.

Is 16 a factor of 80? Give a reason.

Classify 10 as prime, composite, or neither.

What is the greatest common factor of 18 and 45?

Find the 9th positive multiple of 5.

Find the least positive common multiple of 10 and 11.

Is 12 a factor of 84? Give a reason.

Classify 23 as prime, composite, or neither.

What is the greatest common factor of 22 and 42?

Find the 10th positive multiple of 10.

Find the least positive common multiple of 13 and 12.

List all positive factors of 81.

Classify 1 as prime, composite, or neither.

What is the greatest common factor of 32 and 45?

Find the 11th positive multiple of 10.

Find the least positive common multiple of 11 and 5.

List all positive factors of 256.