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

Have You Got It?

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

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Is it possible to rearrange the numbers 1,2......12 around a clock face in such a way that every two numbers in adjacent positions differ by any of 3, 4 or 5 hours?

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?