One block is needed to make an up-and-down staircase, with one step up and one step down. How many blocks would be needed to build an up-and-down staircase with 5 steps up and 5 steps down?
In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?
Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!
Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.