An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
Choose any three by three square of dates on a calendar page...
Investigate how you can work out what day of the week your birthday will be on next year, and the year after...
A recipe for eight flapjacks needs 2oz butter, 3oz sugar and 4oz rolled oats.
How many flapjacks can I make if I have 14oz butter, 15oz sugar and 16oz rolled oats?
If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.
This problem is taken from the UKMT Mathematical Challenges.