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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?

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?

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.
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