SSC CHSL 2025 · PYQ · Surds and Indices · medium
What is the integer part of the value of the expression x = 1/(√121 − √120)?
- A.12
- B.22
- C.21
- D.11✓ Correct
Rationalizing: 1/(√121−√120) × (√121+√120)/(√121+√120) = (√121+√120)/(121−120) = √121+√120 = 11 + √120. √120 ≈ 10.95, so x ≈ 21.95. The integer part is 21, correctIndex = 2.
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