SSC CGL 2024 Tier-I · 10 September 2024, Shift 3 · General Intelligence and Reasoning · Question 11 of 100

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 6 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 — A. MN is drawn as a vertical line to the right of the string, so the reflection is a left-right flip.

Rule: reverse the order of the characters, and laterally invert each one.

The string reads T a r 4 7 g b. The character nearest the mirror is b, so the image must read b g 7 4 r a T from left to right.

Option (a) does both jobs. It opens with a reversed b, the 7 becomes a bar with its leg hanging from the left end, the 4 faces the other way, and the T is unchanged because a capital T is symmetric about a vertical axis.

Why the others are wrong

(b)
The order is reversed correctly, but the 7 is left the normal way round, its leg still hanging from the right end of the top bar. A vertical mirror moves that leg to the left end.
(c)
This opens g then b. The character closest to the mirror is b, so b has to come first in the image, and here the pair is the wrong way round.
(d)
The order is right and the 7 is reflected, but the 4 is drawn unreflected, in its ordinary form. Every character without a vertical axis of symmetry has to flip.

Concept

A mirror on a vertical line gives lateral inversion: left and right swap, top and bottom do not.

Two things change together, and a wrong option usually does only one of them. The characters come out in reverse order, and each individual character is itself flipped left to right.

Symmetric characters are the free ones. A capital T has a vertical axis of symmetry, so it survives the mirror unchanged and gives you a fixed point to check your reading against.

The orientation of MN decides everything.

Had the line been drawn horizontally, this would be a water-image question: the order would stay T a r 4 7 g b and each character would flip top to bottom instead.

Key facts

A vertical mirror reverses left and right and leaves top and bottom alone.
In the reflected image the character nearest the mirror appears first.
A capital T is symmetric about a vertical axis, so a vertical mirror leaves it unchanged.

Study next

Water-image questions, where the mirror line runs horizontallyMirror images of figures rather than character stringsWhich capital letters survive a vertical mirror unchanged

Common traps

Reversing the order and forgetting to flip the individual characters.
Flipping the characters and leaving them in their original order.
Assuming digits are symmetric, when 4 and 7 both change under reflection.

SSC mixes capitals, lowercase letters and digits in one string so that at least one character is symmetric and the rest are not, which is what separates the near-miss options.

Paper-folding rests on the same reflection idea — also 10 Sep 2024, 16:00, Reasoning Q.8.

Related PYQs

No directly related past PYQ was found.