Do you know a quick way to check if a number is a multiple of two? How about three, four or six?
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.
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.
How have "Warmsnug" arrived at the prices shown on their windows? Which window has been given an incorrect price?
A game in which players take it in turns to choose a number. Can you block your opponent?
Collect as many diamonds as you can by drawing three straight lines.
Can you be the first to complete a row of three?
Four friends must cross a bridge. How can they all cross it in just 17 minutes?
Can you find a reliable strategy for choosing coordinates that will locate the robber in the minimum number of guesses?
Who said that adding, subtracting, multiplying and dividing
couldn't be fun?
Here's a neat trick you can do with an 11 by 11 square...
There is nothing half so much worth doing as simply messing about in boats...
A collection of short Stage 3 and 4 problems on Thinking Strategically.