Quick Math
In Quick Math you get thirty seconds, simple sums, three answer keys. Wrong answers cost a second. Free, no install, no sign-up, works offline.
In Quick Math, you get thirty seconds and a stream of small sums. Three keys are lit up for each question; answering correctly adds a little time, answering wrong takes a second away.
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Works offline after the first visit. No install, no sign-up.
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How to play Quick Math
The three kinds of question
Addition, subtraction and multiplication only. There is no division, and no answer is ever negative — subtraction is generated so the result stays at zero or above.
Time is the only pressure
You start with 30 seconds. A correct answer adds 0.6 of a second back, up to the 30 second ceiling, so answering quickly is what keeps the round alive.
A wrong answer costs a second, not a point
Your score only counts correct answers. Missing one takes a full second off the clock instead, which matters far more than a lost point would.
Only three keys are lit for each question
The correct answer plus two nearby wrong ones are highlighted; the other six keys are dimmed. Finding the number is not part of the challenge — picking the right one is.
The same question never repeats twice in a row
A new sum is generated after each answer, and the generator refuses to hand you the identical question twice consecutively.
Quick Math Tips and Strategy
Only three keys are lit
Out of nine buttons only three are bright, and one of those three is always right. Reading the numbers on the keys is wasted time, because the choice is already on screen. Work out the sum first, then look, and your hand goes straight to the answer instead of scanning a row of digits.
A wrong answer is a second, not a point
Your score only counts correct answers, so a mistake costs you nothing in points and exactly one second off the clock. That makes guessing much cheaper than it looks, and it makes hesitating the genuinely expensive move. When two lit keys look close, commit to one rather than re-reading the question.
Answer speed is the whole game
A correct answer returns 0.6 seconds and the bar is capped at 30, so the clock only holds steady while you are answering faster than that. Slow but accurate play drains the bar to empty and ends the round at a low score. Multiplication is where the time goes, so treat those as the ones to drill.
Quick Math — Frequently Asked Questions
Can the answer be negative?
No. Subtraction questions are built from a larger number minus a smaller one, so the answer is always zero or above.
Is there division?
No. Only addition, subtraction and multiplication, to keep it about quick mental arithmetic rather than written working.
What happens when I run out of time?
The round ends and your number of correct answers is your result. There is no penalty beyond that.
Can I gain more than 30 seconds?
No. Correct answers top the clock back up towards 30 seconds but never past it.
Does it need installing or an account?
No. It runs in the browser on a phone, tablet or computer and works offline after the first visit.