How many starfish could there be on the beach, and how many children, if I can see 28 arms?
Use these four dominoes to make a square that has the same number of dots on each side.
Lee was writing all the counting numbers from 1 to 20. She stopped for a rest after writing seventeen digits. What was the last number she wrote?
Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?
Use the 'double-3 down' dominoes to make a square so that each side has eight dots.
What is the greatest number of squares you can make by overlapping three squares?
