### Consecutive Numbers

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

### 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.

### 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?

# Diagonal Product Sudoku

##### Age 11 to 16Challenge Level

In the sixth row, two arrows are pointing at the second cell. Which numbers satisfy both arrows?

Alison and Charlie kept a record of the order in which they filled the Sudoku.

They filled the cell marked 1 first, then the cell marked 2, then the cell marked 3...

You might like to retrace their route to fill in the cells in the same order, though this is just one possible route through the problem.

You can print their journey here