Y5 Maths Problem with Mr Mugan

Date: 18th Oct 2019 @ 3:27pm

Two weeks ago, Mr Mugan came to our classroom to see if any of us could solve a very difficult maths problem. We had such fun and completed so much problem solving that our brains hurt afterwards.

Question: Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person:  1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Can you solve the problem?