UPSC Prelims 2009·GS1·science-and-technology·science and technology

How many letters of the English alphabet (capitals) appear same when looked at in a mirror?

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Last updated 23 May 2026, 3:31 pm IST
  1. A9
  2. B10
  3. C11Correct
  4. D12

Explanation

The correct answer is 11 because these specific capital letters possess vertical symmetry. When a vertical mirror is placed next to them, the reflected image is identical to the original letter. The 11 letters are: A, H, I, M, O, T, U, V, W, X, and Y. Letters like B, C, D, or E change orientation in a mirror because they lack vertical symmetry. Only these 11 capital letters remain unchanged.
science-and-technology: How many letters of the English alphabet (capitals) appear same when looked at in a mirror?

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