Rotation vs reflection
Flip and turn are not the same move.
← All countdown tipsIn non-verbal reasoning, rotate means turn a shape around a point, and reflect means flip it over a mirror line. The options often look almost the same — one is the right transform, the others are the wrong kind of move.
Picture it: turn vs flip
- Rotate — every point swings the same angle around the centre
- Reflect — every point lands as far the other side of the mirror as it started
- Same outline can hide both tricks — check which transform the question asked for
Remember — the method
- Mark a clear feature (dot, thick edge, shaded corner) on the original.
- For a turn: imagine the whole shape spinning 90° or 180° — that feature moves with it.
- For a flip: draw the mirror, then ask what lands on the other side.
- Reject any option that used the other transform, even if it “looks similar”.
Common turns & mirrors
Rotation amounts
90° = quarter turn · 180° = half turn · 270° = three-quarters
Clockwise vs anti-clockwise matters — read the question.
Mirror lines
Vertical = left↔right flip · Horizontal = top↔bottom flip
Diagonal mirrors appear too — still “flip”, not “spin”.
Exam trap
Options that are a reflection when the question asked for a rotation (or the other way round). They look “nearly right” because the outline is familiar — but a marked corner ends up in the wrong place.
✓ Rotate 90° clockwise
✗ Same shape, but reflected
Question patterns you might see
Same skill, harder outfits — from a clear quarter-turn to mixed transform traps.
1 · Simple — Quarter turn clockwise
“Which shows the arrow after a 90° turn clockwise?” Track the tip — it should move a quarter of the way round the centre.
2 · Simple — Vertical mirror
“Reflect in the vertical line.” Left and right swap; top and bottom stay put. The dot that was on the right of the stem moves to the left.
3 · Simple — Shaded circles, 90° anticlockwise
“Some of the circles have been shaded. Which option shows the grid after a 90° anticlockwise turn?” Track one shaded circle around the centre — the whole pattern turns as one block.
Expl. Every shaded circle swings 90° anticlockwise about the centre — each filled cell moves with the whole pattern. C is correct; traps are clockwise, a mirror, 180°, or the original.
4 · Simple — Shaded squares, 90° anticlockwise
Same rule on a filled-square grid (the “checkbox” look). Pick the option after 90° anticlockwise — ignore options that only flip or turn the other way.
Expl. Every shaded square swings 90° anticlockwise about the centre. Trap answers flip the grid (mirror), turn it the other way, turn it 180°, or leave it unturned — E is correct here.
5 · Medium — Half turn (180°)
A 180° rotation puts every point opposite the centre. It can look like a flip at a glance — check a one-sided mark: after 180°, it is upside-down and swapped sides.
6 · Medium — Circles: 180° vs flip
Question asks for a half turn. A is 180°; B is a vertical mirror. After 180°, a shaded circle moves opposite the centre (top↔bottom and left↔right); a flip only swaps left↔right.
7 · Medium — Horizontal mirror
“Reflect in the horizontal line.” Top and bottom swap; left and right stay. Easy to mix with a vertical flip if you rush.
8 · Trickier — Squares: rotate vs reflect
Question asks for 90° anticlockwise. A is the correct turn; B is a vertical mirror that can look similar at a glance — check where a corner square lands.
9 · Trickier — Same-looking wrong transform
Question asks for a rotation. One option is the correct turn; another is a reflection that looks almost identical for this shape. Track the marked corner.
10 · Trickier — Clockwise vs anti-clockwise
Both options are 90° turns — but one goes the wrong way. Read “clockwise” / “anti-clockwise” before you pick.
11 · Trickiest — Two steps, one rule each
“Rotate 90° clockwise, then reflect in a vertical mirror.” Do the moves in order. Doing the flip first (or only one step) lands on a popular wrong option.
Coach tip: before choosing, say the rule out loud — “turn” or “flip” — then check one marked corner. If that corner is wrong, the whole option is wrong.
Tomorrow (D-23): “Of” means multiply — fractions of amounts.
Next step
Practice locks the idea in. WhatsApp delivers tomorrow’s tip to your phone — same group as mock updates.