Packing Boxes

Look at the times that Harry, Christine and Betty take to pack boxes when working in pairs, to find how fast Christine can pack boxes by herself.
Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving
Being curious Being resourceful Being resilient Being collaborative


Harry, Christine and Betty are packing $36$ boxes of chocolates.

 

  • Harry and Christine would take $2$ hours to pack the boxes
  • Harry and Betty would take $3$ hours
  • Christine and Betty would take $4$ hours



How many boxes does Christine pack in one hour?

 

 

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.