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SSC CHSL 2025 · PYQ · Number System · medium

Which number is NOT real?

  1. A.√7
  2. B.-√7
  3. C.1/√7
  4. D.√-7✓ Correct

Explanation

√-7 is an imaginary number (it equals i√7 where i is the imaginary unit), so it is not a real number. All other options are real numbers.
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