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'Countdown' printed from http://nrich.maths.org/
Here is a chance to play a version of the classic Countdown Game
Choose any 6 cards. The top row contains the numbers 25, 50, 75, 100 and the bottom row contains numbers from 1 to 10.
Click on "play" to set a target. The challenge is to use the numbers available and the four standard operations (addition, subtraction, multiplication and division) to hit the target.
Each card can only be used once. It may not be necessary to use all the cards.
It is always possible to hit the target. Clicking on "Show a solution" will offer one possible way in which the target can be reached, but it will not necessarily be the most efficient solution.
You may like to take on the challenge on your own or choose to play it as a game in which the first to reach the target gets a point. First to 10 points wins.
An alternative game could set a time limit and require the players to get as close to the target as possible. Each player could start with 100 points and then points could be deducted according to how far from the target each player has reached - e.g. 6 away from the target would mean that 6 points were deducted. After a set number of rounds, the player with the highest score wins.
A more challenging version of this game is available at Countdown Fractions
This text is usually replaced by the Flash movie.
- unzip first, then open Countdown.html in a browser.