KALCO – 24 Game Number Puzzle
A brain-teasing number puzzle where you combine four numbers to make 24.
What it does
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A simple math puzzle: make 24 from four numbers.
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From gentle starts to genuinely tricky boards.
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A quick brain workout for spare moments.
KALCO is a number puzzle where you combine four numbers to make exactly 24. Mix addition, subtraction, multiplication and division to find an expression that lands on 24 — simple rules, surprisingly deep play.
Simple rules, deep play
Four numbers, one target of 24, any mix of the four operations. Some boards still keep the answer just out of reach — and cracking them is addictive.
A brain workout for spare minutes
Each board takes only a moment, so it fits a commute, a break or the minutes before bed — and it sharpens mental arithmetic and flexible thinking.
From gentle to genuinely tricky
You start with approachable boards and work up to real head-scratchers. The more you like numbers, the more it pulls you in.
Frequently asked questions
Is it free?
It's basically free to use. See the Google Play listing for details.
Can I play offline?
Yes, you can play offline.
Any tips for solving?
Starting from multiplication and division often gets you close to 24.
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