Speed quiz
Square numbers from 1 to 20 squared
Twenty squares in a shuffled order. A number appears; type its square. Skip any you are unsure of and come back.
- Format
- Type them all
- Items
- 20 answers
- Limit
- 1:30
- Level
- Medium
- Checked
- 2026.10.03
- Answers
- 20
- Time limit
- 1:30
- Order
- One at a time, skip allowed
- Matching
- Case and accents ignored
- The highlighted slot is the one to answer.
- Prev and Next skip around; click a slot to jump to it.
- Enter on an empty box skips; the up and down arrow keys step through the slots.
- Pause whenever you like (Esc). The board hides while the clock is stopped.
Type the square of each number.
About this quiz
A square number is a whole number multiplied by itself. The first twenty run from 1 to 400.
- Each square is the sum of consecutive odd numbers: 16 is 1 + 3 + 5 + 7.
- A square number never ends in 2, 3, 7 or 8.
- 13 squared is 169 and 14 squared is 196: the same digits in a different order.
- 20 squared is 400, four times 10 squared.
More quizzes like this
| No. | Quiz | Section | Format | Items | Added |
|---|---|---|---|---|---|
| 01 | Times tables sprint A times tables speed test: 66 multiplication questions from 2 x 2 to 12 x 12, one at a time with no skipping. How many can you answer in two minutes? Speed / Type them all / 66 answers | Speed | Type them all | 66 | 2026.10.03 |
| 02 | Count down from 100 by sevens Start at 100 and keep taking away 7: type 93, 86, 79 and so on down to 2. Fourteen answers, one minute, and one wrong answer ends the run. Speed / Type them all / 14 answers | Speed | Type them all | 14 | 2026.10.03 |
| 03 | Typing challenge Type each word as it appears, one after another, for 60 seconds. The words get longer as you go, and a subtle theme links them. Speed / Type them all / 52 answers | Speed | Type them all | 52 | 2026.10.02 |