Question

2. Which set of numbers have a least common
multiple of 80?
A. 4 and 20
B. 8 and 10
C. 16 and 20
D. 12 and 40

Answer 1

Answer:

• C.

Step-by-step explanation:

Multiples of 16:

• 16, 32, 48, 64, 80

Multiples of 20:

• 20, 40, 60, 80, 100.

Here are the options verified:

• A. 4 and 20. Incorrect. It takes a while to get to 80 by 4's.
• B. 8 and 10. Incorrect. Same thing goes with A, but with 8's.
• C. 16 and 20. Correct.
• D. 12 and 40. Incorrect. 12 is not a multiple of 80.

Option C is your answer.