एक दर्पण में अंग्रेज़ी वर्णमाला (बड़े अक्षरों में) के व्यंजनों के प्रतिबिंबों का अवलोकन किया जाता है । इनमें से उन प्रतिबिंबों की संख्या कितनी है जो अपनी मूल आकृति के समान दिखाई नहीं देते हैं ?
Read this question in English
Images of consonants of the English alphabet (Capitals) are observed in a mirror. What is the number of images of these which do not look like their original shapes?
(a) 13 · (b) 14 · (c) 15 · (d) 16
उत्तर और व्याख्या · explanation in English
Answer: (b) 14
A capital letter looks unchanged in a mirror only if it is symmetric about a vertical line. Of the 21 consonants, only H, M, T, V, W, X and Y are, so 14 consonants look different.
- The alphabet has 26 − 5 = 21 consonants (leaving out A, E, I, O, U).
- A mirror flips left and right, so only letters symmetric about a vertical line look the same.
- Such consonants: H, M, T, V, W, X, Y — 7 letters.
- Consonants whose images look different: 21 − 7 = 14.
- Check: B, C, D, F, G, J, K, L, N, P, Q, R, S, Z — 14 letters.
Remember · Mirror-symmetric capitals: A, H, I, M, O, T, U, V, W, X, Y — learn the list once.
Question and answer: UPSC's official GS Paper II (2021, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·