Mirror image questions ask which of four candidate shapes is the exact vertical reflection of a single asymmetric source polygon, and on the Mirror Image Quiz every right answer adds exactly 200 points toward a fixed five-round, 1,000-point finish. The defining feature is that each candidate is rendered from its own six-point coordinate array rather than from a styling trick, so only one option can map every source x to the opposite side of the mirror line. The published board spans a 100 by 100 product space, the dashed vertical mirror line sits between the two halves, and the reflection rule replaces x with 100 minus x while leaving y untouched. Because the source polygons are deliberately asymmetric — different horizontal distances, varied vertical positions, distinct turns, varied edge lengths, and a visible orientation marker on the first point — a half-turn, an unchanged copy, or a casually-mirrored approximation cannot accidentally qualify. That is what makes the quiz both solvable and disprovable: a player can check each option point by point, know that exactly one matches, and use the remaining lives wisely when the layout is unfamiliar.
What Counts as a Mirror Image Question Here
A mirror image question shows a figure on one side of a mirror line and asks which of several options is the true reflection. Most paper mirror image exercises come from reasoning handouts or examination item banks, with the difficulty usually coming from small visual tricks: a half-turn that almost works, a near-reflection off by one vertex, or a copy that only differs in shading. The Mirror Image Quiz keeps the same surface problem but anchors it in literal coordinates, so the difficulty shifts from judging style to comparing actual numbers.
Each round shows one six-point source polygon on the left side of a dashed vertical mirror line, with four candidate polygons arranged below in a two-by-two grid. The question asked is unchanged across formats: which candidate places every point at the matching distance on the opposite side while leaving every point at the same height? The answer is determined by comparing source coordinates against each candidate's own coordinate array, point by point. Because tests prove all four arrays are unique within a round, only one can match the reflection of the source. That single-match guarantee gives every round a clear pass-or-fail outcome and removes the guesswork that haunts static worksheets.
The Single Rule Behind Every Round
There is one rule, and it works for all six points in every round: a vertical mirror on the 100-by-100 board replaces each x coordinate with 100 minus that coordinate and leaves each y coordinate unchanged. The rule is applied identically to all six source points before any candidate is compared. It is the same transformation that comes up in geometry textbooks and reasoning guides, but written out here as a closed-form recipe on a fixed board.
Worked example from the public fixtures:
- Source point at x = 10, y = 18 reflects to x = 90, y = 18.
- Source point at x = 36, y = 24 reflects to x = 64, y = 24.
- Source point at x = 50, y = 50 — sitting exactly on the mirror line — reflects to itself in both coordinates.
Boundary test points at x = 0 and x = 100 confirm the same mapping: 0 reflects to 100 and 100 reflects to 0, with y held constant. Because the rule is mechanical and the board is closed, an independent test oracle lists all thirty expected reflected points across the five rounds and proves that each round has exactly one matching candidate.
Solving Mirror Image Questions Across the Five Rounds
- Read the source polygon on the left of the dashed vertical mirror line and identify its six source points. The first point carries a visible orientation marker that is repeated in every candidate, so it is a useful anchor for orientation.
- Apply the rule x becomes 100 minus x while y stays unchanged to every one of the six points. If it helps, write the six reflected coordinates on a scrap of paper beside the four option labels (A, B, C, D).
- Scan the four candidate polygons. Each one is rendered from its own literal array of six coordinates, and the four arrays are genuinely different — there is no duplicated decoy that only differs in style or fill.
- Pick the candidate that matches your six reflected coordinates point by point. Because the source shapes are deliberately asymmetric, only the true vertical reflection will qualify; a half-turn, an unchanged copy, or a partial approximation will fail at one or more vertices.
- Submit the choice with a click, a tap, or the keyboard. A correct answer awards exactly 200 points and advances to the next original polygon. If you select a wrong option first, you can correct your choice without a fresh penalty — choosing the same wrong option a second time is not a new miss, only a different wrong option is.
- Clear five rounds for the fixed maximum of 1,000 points. After the score reaches 1,000, the controls freeze until Restart returns the game to the first polygon.
Scoring, Misses, and the 1,000-Point Finish
The score progression on a clean run is exact: 200, 400, 600, 800, 1,000. An independent complete-state simulation chooses the five oracle-derived options and verifies those five values without arithmetic gaps. Each correct answer is locked at 200 points whether it is the first attempt or comes after a repairable miss, so there is no bonus for first-try perfection and no penalty for picking the same wrong option twice.
The miss logic is just as deliberate. Failures are recorded as a normalized round-and-option signature. Choosing the same wrong option twice does not add a second failure — the second pick is deduplicated. Choosing a second different wrong option in the same round deadlocks the run and requires Restart to recover. Once a round deadlocks, every control is frozen in its current state and the score remains fixed at whatever it reached before the deadlock.
| Outcome within a round | Points for this round | Game state |
|---|---|---|
| First-try correct | 200 | Advance to next round |
| First wrong, then correct | 200 | Advance to next round |
| Same wrong option chosen twice | 0, one failure kept | Round remains live |
| Second different wrong option | 0 | Deadlock — Restart required |
| Completed five rounds | — | Score frozen at 1,000 |
Reading the Four Options Without Guesswork
Some mirror image questions rely on visual traps: half-rotated copies, near-reflections off by one vertex, or unchanged figures disguised by a subtle slant. The Mirror Image Quiz removes those traps by construction. All five source polygons are deliberately asymmetric — their horizontal distances, vertical positions, turn directions, and edge lengths all vary — and the first point wears a visible orientation marker that is repeated consistently in every candidate. A half-turn would reverse that marker, which is one of the reasons a half-turn will never pass. Every option stores its own six points; there is no CSS transform, scale, or styling shortcut that fakes a different shape from another. Tests confirm all four serialized arrays are unique within a round, and the matching position rotates across rounds to cover every corner of the two-by-two grid, so a player cannot rely on always picking the same spot.
No semantic label, stored correct index, ARIA description, data attribute, hidden text, CSS class, or status element leaks the answer. Correctness is derived only by generating the reflection and comparing the candidates' literal coordinate arrays point by point. The practical reading strategy is to apply the rule to the six source points first, then sweep the four candidates once, eliminating any option whose points fail to line up at vertex one or two. By the third point, only one candidate should remain, and the rest can be confirmed at a glance.
Controls, Storage, and Practical Notes
The keyboard is scoped to the four-option group. Focusing any candidate makes it the logical cursor. Left and Right arrow keys move within the current row, while Up and Down move between the two rows of the grid. After every cursor move, roving focus moves the real DOM focus to the same option, so the focus ring, aria-current announcement, and Enter or Space selection all stay aligned. Repeated keydown events are ignored, so holding a key does not skip options. The page installs no global arrow, Enter, or Space listener, so Restart and other browser controls retain their native behavior.
Pointer and touch players can select the same candidate buttons directly. The two-column option grid is compact enough to fit a 390-pixel viewport, while flexible widths give each choice far more than the 44-pixel minimum hit height. A double-Escape boss screen hides the quiz without changing the round, cursor, failures, or score. All logic runs locally in the browser. Source points, choices, failures, and scores are not uploaded. If browser storage is available, the shared game shell stores only the best completed score on the device; blocked storage removes that convenience without changing the puzzle. No account, paid service, network calculation, image upload, camera, sensor, package, or new dependency is required. Restart returns the game to the first polygon with a fresh failure record and a zero score.
Mirror Image Quiz vs. Paper Mirror Image Questions
| Aspect | Paper mirror-image handouts | Mirror Image Quiz |
|---|---|---|
| Source figures | Stock or recycled images | Five original asymmetric six-point polygons |
| Mirror axis | Often ambiguous or implied | Dashed vertical line on a 100-by-100 board |
| Options per question | Usually 4 | 4 literal coordinate arrays, all unique per round |
| Guarantee of one match | Depends on the setter | Exactly one match per round, oracle-verified |
| Scoring | None, or simple right-or-wrong | 200 points per correct match, 1,000 max |
| Question count | Variable | Fixed at five |
| Feedback on a wrong pick | Usually none | Neutral correction prompt; same wrong option deduplicated |
| Recovery from a miss | Not applicable | Yes — choose a different option in the same round |
| Accessibility | Print only | Keyboard, touch, pointer, screen-reader labels A–D |
| Persistence | None | Best score stored locally on the device |
Most paper mirror image questions are useful for reasoning practice, but their quality varies and they have no scoring ceiling. The Mirror Image Quiz packages the same reflection question into a fixed five-round run with an exact 1,000-point finish, one mathematical rule, oracle-verified correctness, and keyboard-friendly controls.
Putting the Five Rounds Together
The full Mirror Image Quiz applies the x → 100 − x rule across five author-built asymmetric polygons, awards exactly 200 points per correct match, and reaches the fixed 1,000-point finish on a clean run. For a guided walkthrough of every polygon and each recovery path, the dedicated How to Play Mirror Image Quiz: 5 Rounds to 1,000 Points guide runs through the steps in order. The game is built for recreation: it does not measure intelligence, spatial reasoning, vision, or any other human trait, and a score reflects choices within those five fixed authored polygons rather than any personal ability.
Related reading: Mirror Laser Puzzle Game: How Slash Tiles Route Rays.