Countdown Numbers Game
Use each number at most once. Whole-number results only.
Working
Tap a number, then an operation. You can also type x, * or ×.
Need a hand? Ask for a hint or explore a solution.
How to play
Combine the six numbers with addition, subtraction, multiplication or division to reach the target. Use each number at most once, and keep every result a positive whole number. Every round has a valid solution.
Teacher guideHow do I enter my answer?
Tap the blue number cards and the operation buttons, or type a single calculation. Multiplication accepts x, X, * and ×. Use brackets to group a sum, for example (25 + 50) × 3. Each card can be used once, including each separate copy of a repeated number.
Does my solution have to match the one shown?
No. Any calculation that reaches the target and follows the rules is accepted. Show solution gives one short route. Explore solutions lets you compare a selection of short and longer methods.
Can the class choose the numbers?
Choose numbers lets pupils take turns drawing from the large and small card decks. Once six cards are picked, Set target finds a solvable challenge for those exact numbers. If your target restrictions leave no solution, you can explicitly choose a wider target range or draw again.
Can I use it on a classroom whiteboard?
Classroom mode offers an enlarged board without advertising, an optional ticking clock and fullscreen controls. The timer can run for 30 seconds, one, three or five minutes. Printable worksheets include a separate answer key and contain no ads.