Mental rotation
Turn a 3D shape in your mind. Is it the same, or a mirror image?
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Example
Example
Example Drag to turn.
Turn shapes in your mind. After answering, drag to check.
6 cubes, 90° or 180°, straight axes only
Your last settings are ready. Change them whenever you like.
6 questions · No time limit
Visual practice. No audio version.
Keyboard: 1 and 2 answer, Space or Enter advances, Esc ends practice. After you answer, drag either shape, or focus it and use the arrow keys, to turn it and check the answer. In Turn to match, drag the right shape or focus it and use the arrow keys, Page Up and Page Down to turn it a quarter turn at a time; press 1 for Match or 2 for Mirror when no turn can match it.
- Answered
- 0 / 6
- Active time
- 0:00
Same shape, or a mirror image?
Round complete.
- Correct answers
- Active time
Review answers
Saved to your statistics.
- Answered
- 0 / 6
- Active time
- 0:00
Interrupted questions are excluded from answer-speed metrics.
Continue your unfinished round
Your answers are saved in this tab. Continue from where you left off.
Continuing uses no additional practice start.
Discard the unfinished round?
Your answers from this round will be discarded. You can choose your settings before starting a new round.
Starting the new round uses one practice start.
Example
Example
Which plan turns Start into Target?
Order three quarter-turns.
6 questions · No time limit
Explore the method
Follow an uneven shape through a turn and a reflection.
On by default unless you turn it off. Saved choices are kept. Shares starts, completions, replays and error categories. For ChatGPT visits, starts and completions may include the first QuickenBrain page and country. No answers, drawings or names.
How this data is usedCompare two 3D shapes to decide whether they match after rotation or are mirror images. In Same or mirror, each round has 6 to 10 questions by level, scored by correct answers with no time limit.
About this practice
Compare two 3D shapes to decide whether they match after rotation or are mirror images. In Same or mirror, each round has 6 to 10 questions by level, scored by correct answers with no time limit.
Same or mirror shows two block figures. Decide whether the right one is the same shape turned, or its mirror image turned. Half the questions are mirror images, so always choosing one answer scores half.
In Turn to match, turn the right shape a quarter turn at a time until it matches. If no turn works, press Mirror.
In Pick the match, choose the matching figure from 5 options. Compare arm connections: all options have the same number of cubes.
What it measures, and what it does not
This practices holding a solid in mind, turning it, and comparing it with another. Folding and cutting are separate tasks. Six to ten questions give a short snapshot, so scores vary.
What each level changes
In Same or mirror, the levels change the figure size, turn angles and round length:
- Levels 1 and 2: 6 cubes, turns of 90 or 180 degrees. 6 questions.
- Levels 3 and 4: 7 cubes, turns of 60, 90, 120 or 180 degrees. 6 or 8 questions.
- Levels 5 and 6: 8 cubes, turns of 45, 60, 90, 120, 135 or 180 degrees. 8 questions.
- Levels 7 and 8: 9 cubes, turns in 15 degree steps from 30 to 180 degrees, around diagonal axes as well. 8 or 10 questions.
Up to level 6, every turn is around an axis that runs along the edges of the blocks.
Two worked examples
Example 1, level 2: both figures have 6 cubes. Follow the arms from corresponding ends. They come in the same order and bend the same way. The right figure is the left one turned 180 degrees, without reflection. Answer: Same, rotated.
Example 2, level 2: the right figure is the left one’s mirror image, turned 180 degrees. Line up two arms and the third points the other way. No turn fixes that. Answer: Mirror image.
What your result means
Results count correct answers and show median answer time when available. Same or mirror separates turned and mirrored figures. For missed mirrors, follow a bent arm: reflection reverses its bend. With sharing enabled and enough saved rounds, this mode shows the share of rounds at that level that scored lower. Compare your results within the same mode and level.
For four more worked examples and the research behind this task, read the guide Mental rotation test: turned or mirrored. For the method, try the lesson Turn a shape, don’t flip it.
For a broader mix of practices, explore the spatial practice test. Sign in free to start a test.
Report a problem
On by default unless you turn it off. Saved choices are kept. Shares starts, completions, replays and error categories. For ChatGPT visits, starts and completions may include the first QuickenBrain page and country. No answers, drawings or names.
How this data is used