on her bicycle anna circles the block every 4 minutes. On his scooter her brother circles the block every 10 minutes. They start out together in how many minutes will they meet again at the starting point?

Question

anonymous · Answer

What level of class is this?

anonymous · Answer

You could write a list of times Anna gets back to the starting point... it's every 4 minutes, so 4, 8, 12, etc.

Then do the same for her brother every 10 minutes, so 10, 20, 30, etc.

Then look for the first number in common... this is the first time they are both back at the start.