Chapter 3 — cumulative chapter review

Find the 5th positive multiple of 9.

Find the least positive common multiple of 7 and 13.

List all positive factors of 128.

Classify 49 as prime, composite, or neither.

What is the greatest common factor of 18 and 39?

Find the 2nd positive multiple of 12.

Will 126 be a common multiple of 9 and 7? Explain.

List all positive factors of 20.

Classify 71 as prime, composite, or neither.

What is the greatest common factor of 20 and 33?

Find the 3rd positive multiple of 10.

Find the least positive common multiple of 6 and 12.

Is 3 a factor of 27? Give a reason.

Classify 39 as prime, composite, or neither.

What is the greatest common factor of 8 and 33?

Find the 5th positive multiple of 15.

Find the least positive common multiple of 8 and 7.

List all positive factors of 72.

Classify 32 as prime, composite, or neither.

What is the greatest common factor of 10 and 24?

Find the 7th positive multiple of 8.

Will 420 be a common multiple of 14 and 15? Explain.

List all positive factors of 64.

Classify 77 as prime, composite, or neither.

What is the greatest common factor of 8 and 45?

Is zero a multiple of 16? Explain.

Find the least positive common multiple of 5 and 5.

Is zero a multiple of 6? Explain using multiplication.

A student says 48 is the least positive common multiple of 6 and 8 because both divide it. Find the actual least positive common multiple.

A learner says 12 has only factors 2, 3, and 4. Explain the omitted factors and list all positive factors.

Sam claims 13 is prime because it is not divisible by 5. Explain why that test is insufficient, and classify 13.

A learner says the greatest common factor of 12 and 18 is 36 because both multiply into 36. Find the GCF.

Is zero a multiple of 9? Explain using multiplication.