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Calendar Capers

Choose any three by three square of dates on a calendar page. Circle any number on the top row, put a line through the other numbers that are in the same row and column as your circled number. Repeat this for a number of your choice from the second row. You should now have just one number left on the bottom row, circle it. Find the total for the three numbers circled. Compare this total with the number in the centre of the square. What do you find? Can you explain why this happens?

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GOT IT Now

For this challenge, you'll need to play Got It! Can you explain the strategy for winning this game with any target?

Connect Three

Stage: 3 and 4 Challenge Level: Challenge Level:1

In this game the winner is the first to complete a row of three, either horizontally, vertically or diagonally.

Roll the dice (one with the numbers $1$, $2$, $3$, $-4$, $-5$, $-6$ and the other with the numbers $-1$, $-2$, $-3$, $4$, $5$, $6$), place each dice in one of the squares and decide whether you want to add or subtract to produce one of the totals shown on the board. Your total will then be covered with a counter.

You cannot cover a number which has already been covered. If you are unable to find a total which has not been covered you must Pass.

The winner is the first to complete a line of three.

You can use the interactive version below or print this board to play away from the computer.


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