Countdown Numbers
Use the given numbers and operations to reach the target.
Make the target number
Use each number tile once, combine them with +, -, ×, ÷ and parentheses, and build one expression that equals the target.
The timer starts after you click Start. The puzzle and scratchpad will open together.My number practice record
Your best time, average time, closest hit, and latest result will appear here after a solved puzzle.
Countdown Numbers Daily ChallengePlay today's shared challenge.
Bulls and CowsDeduce the hidden number from A/B clues.
FutoshikiFill the grid while satisfying every inequality.How to Play Countdown Numbers
- Read the target and the 6 given numbers
- Tap numbers, operators, and parentheses to build an expression
- Use every number exactly once
- The puzzle is complete when the expression equals the target
Online Countdown Numbers: Arithmetic and Combination Practice
Countdown Numbers gives you a set of numbers and a target. Your goal is to combine the numbers with arithmetic and parentheses to make one expression that equals the target.
This kind of practice trains mental arithmetic, number sense, and strategy. With experience, you learn which intermediate values are worth keeping and which paths to abandon early.
Calculation Tips
Build an intermediate target first
Do not chase the full expression immediately. Try making a nearby intermediate result with two or three numbers.
Use large numbers for scale
Large numbers often move you close to the target, while small numbers are useful for final adjustment.
Watch multiplication and division jumps
Multiplication can quickly grow a value, and division can bring an oversized value back into range.
Use each number exactly once
A correct value is not enough. The final expression must use every given number exactly once.
FAQ
Do I need advanced math?
No. Basic arithmetic is enough. The challenge is choosing useful combinations and intermediate values.
Why can each number be used only once?
That rule turns the puzzle from raw calculation into a constrained reasoning game.
What if I cannot hit the target exactly?
In practice mode you can reveal the solution. A closest-result mode can be added later.
What is the scratchpad for?
The scratchpad lets you test intermediate calculations before committing a complete expression.