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

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

Pair Sums

Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?

Kids

Age 11 to 14 Challenge Level:

There are at least twelve solutions to the addition sum

M U M
+ D A D
-- -- -- --
K I D S

You have to replace the seven letters by seven numbers. How many solutions can you find? How many solutions are there?