Chapter 3 — practice examination

Find the 8th positive multiple of 12.

Is 15 a factor of 180? Give a reason.

What is the greatest common factor of 8 and 21?

Find the least positive common multiple of 14 and 11.

Classify 59 as prime, composite, or neither.

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

Classify 46 as prime, composite, or neither.

Find the 5th positive multiple of 8.

Is 11 a factor of 176? Give a reason.

What is the greatest common factor of 20 and 42?

List all positive factors of 44.

What is the greatest common factor of 14 and 15?

Find the least positive common multiple of 6 and 5.

Classify 45 as prime, composite, or neither.

Find the 5th positive multiple of 5.

Classify 60 as prime, composite, or neither.

Find the 5th positive multiple of 7.

Is 3 a factor of 33? Give a reason.

What is the greatest common factor of 18 and 15?

Find the least positive common multiple of 7 and 14.

What is the greatest common factor of 12 and 24?

Find the least positive common multiple of 10 and 9.

Classify 31 as prime, composite, or neither.

Find the 3rd positive multiple of 13.

List all positive factors of 80.

Find the 4th positive multiple of 11.

Is 12 a factor of 60? Give a reason.

Is zero a multiple of 12? Explain using multiplication.

Find the least positive common multiple of 14 and 5.

List all positive factors of 108.

Sam claims 24 is prime because it is not divisible by 5. Explain why that test is insufficient, and classify 24.

What is the greatest common factor of 10 and 30?

Is zero a multiple of 11? Explain using multiplication.