UPSC CAPF (AC) 2024 Paper I · Question 58

Question 58 of the UPSC CAPF (AC) 2024 Paper I (4 August 2024). Try it first, then open the answer and explanation.

1. CAPF 2024 · P-I · Q58 · General Mental Ability · Arithmetic

   Out of the six digits 1, 2, 3, 4, 5 and 6; how many two digit numbers can be formed without repetition of digits?

   1. 6
   2. 15
   3. 30
   4. 40

   छह अंकों 1, 2, 3, 4, 5 और 6 में से; अंकों की पुनरावृत्ति के बिना दो अंकों की कितनी संख्याएं बनाई जा सकती हैं?

   1. 6
   2. 15
   3. 30
   4. 40
   Show answer

   Answer: (3) 30

   उत्तर: (3) 30

   The tens digit can be any of the 6 digits and the units digit any of the remaining 5, giving 6 × 5 = 30 numbers. 15 would be the count of unordered pairs, but 12 and 21 are different numbers.

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