Four bags contain a large number of 1s, 3s, 5s and 7s. Pick any ten numbers from the bags above so that their total is 37.
On the graph there are 28 marked points. These points all mark the vertices (corners) of eight hidden squares. Can you find the eight hidden squares?
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
Find at least one way to put in some operation signs (+ - x ÷) to make these digits come to 100.
Do you know a quick way to check if a number is a multiple of two? How about three, four or six?
What can you say about the child who will be first on the playground tomorrow morning at breaktime in your school?