You may also like

problem icon

Calendar Capers

Choose any three by three square of dates on a calendar page...

problem icon

Have You Got It?

Can you explain the strategy for winning this game with any target?

problem icon


What are the missing numbers in the pyramids?

Pair Sums

Age 11 to 14 Challenge Level:

Five numbers are added together in pairs to produce the following answers:

$0, 2, 4, 4, 6, 8, 9, 11, 13, 15$

What are the five numbers?