This challenge is about finding the difference between numbers which have the same tens digit.
How will you work out which numbers have been used to create this multiplication square?
Which two items of fruit could Kate and Sam choose? Can you order the prices from lowest to highest?
Can you work out how to make each side of this balance equally balanced? You can put more than one weight on a hook.
If you put three beads onto a tens/ones abacus you can make the numbers 3, 30, 12 or 21. What numbers can be made with six beads?
Start with three pairs of socks. Now mix them up so that no mismatched pair is the same as another mismatched pair. Is there more than one way to do it?
Jack's mum bought some candles to use on his birthday cakes and when his sister was born, she used them on her cakes too. Can you use the information to find out when Kate was born?
On a farm there were some hens and sheep. Altogether there were 8 heads and 22 feet. How many hens were there?
There are three baskets, a brown one, a red one and a pink one, holding a total of 10 eggs. How many eggs are in each basket?
Use the interactivity to help get a feel for this problem and to find out all the possible ways the balls could land.
