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Pair Sums

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

50, 50, 50 and 50

Age 11 to 14 Short Challenge Level:


Aroon says his age is $50$ years, $50$ months, $50$ weeks and $50$ days.

What age will he be on his next birthday?



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

This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.