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4 Dom

Use these four dominoes to make a square that has the same number of dots on each side.

Twenty Divided Into Six

Katie had a pack of 20 cards numbered from 1 to 20. She arranged the cards into 6 unequal piles where each pile added to the same total. What was the total and how could this be done?

Mystery Matrix

Can you fill in this table square? The numbers 2 -12 were used to generate it with just one number used twice.

Satisfying Four Statements

Age 7 to 11
Challenge Level

If you are not sure what a triangular number is, take a look at Picturing Triangular Numbers

You might find it useful to record each person's numbers on a 1 to 100 grid.