You may also like

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?

Intersection Sudoku 2

Age 11 to 16
Challenge Level


We received an email from Anna Olszanska, a maths teacher at a school in Warsaw, Poland, telling us that this puzzle was solved by some of her 13-15 year old students during the School Sudoku Challenge. The best time was 19 minutes and was achived by Maja.

Well done Maja.