1 out of 3
Try out these calculations. Are you surprised by the results?
1 out of 3
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
1 out of 3
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.
1 out of 3
Can you use the clues to complete these 4 by 4 Mathematical Sudokus?
2 out of 3
Ten cards are put into five envelopes so that there are two cards in each envelope. The sum of the numbers inside it is written on each envelope. What numbers could be inside the envelopes?
2 out of 3
Take three consecutive numbers and add them together. What do you notice?
3 out of 3
How many solutions can you find to this sum? Each of the different letters stands for a different number.
