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Eight Dominoes

Using the 8 dominoes make a square where each of the columns and rows adds up to 8

Score

There are exactly 3 ways to add 4 odd numbers to get 10. Find all the ways of adding 8 odd numbers to get 20. To be sure of getting all the solutions you will need to be systematic. What about a total of 15 with 6 odd numbers?

Medal Muddle

Countries from across the world competed in a sports tournament. Can you devise an efficient strategy to work out the order in which they finished?

Flight of the Flibbins

Age 11 to 14
Challenge Level

Is it possible to send a mixture of blue and red Flibbins across in the boat together?

You can always leave red Flibbins alone together.