Challenge Level

Can you select the missing digit(s) to find the largest multiple?

Challenge Level

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

Challenge Level

A game in which players take it in turns to choose a number. Can you block your opponent?

Challenge Level

There is nothing half so much worth doing as simply messing about in boats...

Challenge Level

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

Challenge Level

Who said that adding, subtracting, multiplying and dividing couldn't be fun?

Challenge Level

Can you explain the strategy for winning this game with any target?

Challenge Level

Four friends must cross a bridge. How can they all cross it in just 17 minutes?

Challenge Level

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.

Challenge Level

Collect as many diamonds as you can by drawing three straight lines.

Challenge Level

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

Challenge Level

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

Challenge Level

Can you do a little mathematical detective work to figure out which number has been wiped out?

Challenge Level

How have "Warmsnug" arrived at the prices shown on their windows? Which window has been given an incorrect price?

Challenge Level

Can you create a Latin Square from multiples of a six digit number?