SSC CGL 2024 Tier-I · 24 September 2024, Shift 1 · General Intelligence and Reasoning · Question 20 of 98

Text as printed on a candidate's response sheet for this shift; answer per SSC's tentative key as marked on that sheet. Solution last reviewed 10 September 2026.

Where this paper and its answers come from

SSC does not publish CGL question papers or a public answer key. The questions and options here are reproduced as printed on a candidate's own response sheet for this shift — the Commission's text, unchanged. Each answer is SSC's tentative key as marked on that sheet; SSC allowed challenges to it and never publishes a final key. The solutions are written by UnlockIAS.

Select the correct mirror image of the given figure when the mirror is placed at MN.

Answer

Why

Correct — B. MN is the vertical line at the right of the string, so the whole strip flips left to right.

Rule: the order reverses — G r 3 d 7 e becomes e 7 d 3 r G — and each character is flipped about its own vertical axis.

Option (b) satisfies both tests. Its e opens towards its lower left, its 7's tail leans down to the right, and its d has become a b-shape with the stem on the left.
Its 3 bulges leftwards, its r's stem sits to the right of its shoulder, and its G opens to the left.

Why the others are wrong

(a)
The e is not flipped — its opening still faces the lower right, as in the printed string. Its d has also become a p, which is the mirrored b turned upside-down.
(c)
The d and the 7 have kept their printed order and their printed shapes. A true mirror puts the 7 before the d and flips both.
(d)
The 3 and the r are unflipped: the 3 still bulges to the right and the r's stem still stands to the left of its shoulder.

Concept

A vertical mirror does exactly two things to a line of text. It reverses the order of the characters, and it flips each character about its own vertical axis. Nothing moves up or down.

Work it as a checklist, not as a picture. Write the string backwards first, then pick out the characters with the loudest left-right asymmetry — here r, d, 3 and G — and test only those in each option.

The first mismatch ends the question, so you never have to verify all six characters of a wrong option.

Case survives a mirror. An upper-case G stays upper-case, and a lower-case d does not turn into a capital B — it becomes a mirrored d that merely resembles a b.

Key facts

The printed string is G, r, 3, d, 7, e, so its mirror image reads e, 7, d, 3, r, G from left to right.
A vertical mirror preserves the top and bottom of every glyph and swaps only left and right.
A mirrored lower-case d looks like a b, and a mirrored 3 carries its bumps on the left.

Study next

Water images of alphanumeric stringsMirror items where MN is drawn above or below the figureGlyphs unchanged by a vertical mirror, such as A, H, M, O, T and 8

Common traps

Reversing the order but leaving one or two glyphs unflipped.
Turning a glyph upside-down, which is a water image rather than a mirror image.
Checking only the two end characters of each option.

Mirror-at-MN strings also appear at 9 Sep 2024, 12:30, Reasoning Q.2 and Q.3, again as four picture options with nothing to read as text.

Related PYQs

No directly related past PYQ was found.

Topic: Space Visualization — all 88 SSC CGL questions on it, every solved shift.