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Consecutive Numbers

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

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Tea Cups

Place the 16 different combinations of cup/saucer in this 4 by 4 arrangement so that no row or column contains more than one cup or saucer of the same colour.

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Counting on Letters

The letters of the word ABACUS have been arranged in the shape of a triangle. How many different ways can you find to read the word ABACUS from this triangular pattern?

Intersection Sudoku 1

Age 11 to 16 Challenge Level:

  • A clue like 2567 in cell (8,2) confirms the positions of four of the numbers in the surrounding 3x3 square.

  • It is useful to remember that the same number cannot appear in the same row or in the same 3x3 square. This can help with a clue such as1223 in cell (8,6) because it tells you the position of one of the twos.