15 = 7 + 8 and 10 = 1 + 2 + 3 + 4. Can you say which numbers can be expressed as the sum of two or more consecutive integers?
Can you find six numbers to go in the daisy from which you can make all the numbers from 1 to a number bigger than 25?
Try entering different sets of numbers in the number pyramids. How does the total at the top change?
Can you arrange these numbers into 7 subsets, each of three numbers, so that when the numbers in each are added together, they make seven consecutive numbers?
Can you find a way to identify times tables after they have been shifted up or down?
Follow this recipe for sieving numbers and see what interesting patterns emerge.
I'm thinking of a rectangle with an area of 24. What could its perimeter be?
Can you find sets of numbers which satisfy each of our mean, median, mode and range conditions?
Can you figure out how sequences of beach huts are generated?
By selecting digits for an addition grid, what targets can you make?
