Each clue in this Sudoku is the product of the two numbers in adjacent cells.

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.

In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

How many moves does it take to swap over some red and blue frogs? Do you have a method?

The clues for this Sudoku are the product of the numbers in adjacent squares.

By selecting digits for an addition grid, what targets can you make?

Gabriel multiplied together some numbers and then erased them. Can you figure out where each number was?

Can you crack these cryptarithms?

Can you guess the colours of the 10 marbles in the bag? Can you develop an effective strategy for reaching 1000 points in the least number of rounds?

Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?

Can you use small coloured cubes to make a 3 by 3 by 3 cube so that each face of the bigger cube contains one of each colour?

Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?

Can you find the hidden factors which multiply together to produce each quadratic expression?

In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?

The Number Jumbler can always work out your chosen symbol. Can you work out how?

Nine squares are fitted together to form a rectangle. Can you find its dimensions?

Use the differences to find the solution to this Sudoku.

Here is a Sudoku with a difference! Use information about lowest common multiples to help you solve it.

Given the products of adjacent cells, can you complete this Sudoku?