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.
Can you use the clues to complete these 3 by 3 Mathematical Sudokus?
Can you use the clues to complete these 4 by 4 Mathematical Sudokus?
In each of these games, you will need a little bit of luck and your knowledge of place value to develop a winning strategy.
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?
In this 100 square, look at the green square which contains the numbers 2, 3, 12 and 13. What is the sum of the numbers that are diagonally opposite each other? What do you notice?
