Question

Suppose that there is a circular race track. Joseph takes 25 minutes to finish it and Owuor takes 35 minutes

to finish it. If both of them start running from the same point at the same time in the same direction, after
how many minutes will they meet for the first time on the starting point?

Answer 1

They will cross the finish line together in 175 minutes.

Explanation:

This question asks you to consider the 25 and 35 times table.

I listed the 25 and 35 times tables and tried to find the lowest common multiple.

You can see that on Josephs' 7th lap of the track he will cross the line simulatneously with Owuor who will be on his 5th lap. So the answer should be 175 minutes.

25 × 1 = 25 35 × 1 = 35

25 × 2 = 50 35 × 2 = 70

25 × 3 = 75 35 × 3 = 105

25 × 4 = 100 35 × 4 = 140

25 × 5 = 125 35 × 5 = 175

25 × 6 = 150 35 × 6 = 210

25 × 7 = 175

25 × 8 = 200