Question

A skateboarder rides by my office every 12 minutes, and a cyclist rides by every 8 minutes. How long will it take for the skateboarder and cyclist to ride by at the same time?

96 minutes
72 minutes
48 minutes
24 minutes​

Answer 1

24 minutes

Explanation:

The Lowest Common Multiple of 12 and 8 is 24:

1. List all prime factors of 12 and 8

2. Cross out any recurring numbers

3. multiple all remaining numbers with the crossed out ones used once

Answer 2

48 Minutes

Explanation:

find a common factor 48:

4*12

6*8

so the answer is 48.