The number 142²-1 is divisible by :

  1. 19
  2. 9
  3. 13
  4. 7
Anurag Mishra Professor Asked on 27th December 2015 in Maths.
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  • 1 Answer(s)

    Answer: (3) 13

    Solution:-
    142^2 – 1
     = 20164 – 1
     = 20163

    This number is completely divisible by 13. 

    Hence, the correct answer is option (3) 13. 

    Anurag Mishra Professor Answered on 27th December 2015.
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