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  9. Q55

UKPSC PCS 2012 · Question 55 of 78

The digit in the unit’s place of the number 171999 + 111999 – 71999 is

Quant

  1. A3
  2. B7
  3. C9
  4. DNone of theseCorrect

Answer: D. None of these

Explanation

Unit digits: 7^1999 ends in 3, 11^1999 ends in 1; 3+1-3 = 1, which is not listed.

Source: UKPSC 2012 Prelims CSAT Paper-II (adda247/studyfry PDF), exam held 30 Nov 2014

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