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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?

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Teddy Town

There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?

Addition Equation Sudoku

Stage: 3, 4 and 5 Challenge Level: Challenge Level:1
If I label the cells like a coordinate grid, with the bottom left cell as (1, 1) and the top right as (9, 9) then one way of starting is listed below. Can you explain the logic at each step?

(6, 2) (1, 2) (4, 2) (1, 4) (2, 4) (2, 3) (6, 6) (5, 6) (5, 8) (9, 8) (4, 8) (4, 7) (7, 7) (7, 3) (8, 3) (9, 5) (8, 5) (8, 1) (3, 1) (3, 9) (3, 7) (7, 1) (5, 7) (4, 1) (7, 8) (9, 4) (2, 2) (1, 5) (8, 4) (8, 6)