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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