πŸ“’ Too many exams? Don’t know which one suits you best? Book Your Free Expert πŸ‘‰ call Now!

  • google app store apple app store
  • βœ–

      Question

      Four number-pairs are given, out of which three are

      alike in a certain manner and one is different. Choose the different number pair.
      A 268: 208 Correct Answer Incorrect Answer
      B 551: 102 Correct Answer Incorrect Answer
      C 635: 140 Correct Answer Incorrect Answer
      D 397: 282 Correct Answer Incorrect Answer

      Solution

      The logic followed here is as follows: The square of each digit of the 1st number is added together and then, the resultant is multiplied by 2 to obtain the 2nd number. 268: 208 β†’ [2 Γ— {(2)Β² + (6)Β²+ (8)Β² }] = [2 Γ— {4 + 36 + 64}]= [2 Γ— 104] = 208 551: 102 β†’ [2 Γ— {(5)Β² + (5)Β² + (1)Β² }] = [2 Γ— {25 + 25 + 1}]= [2 Γ— 51] = 102 635: 140 β†’ [2 Γ— {(6)Β² + (3)Β² + (5)Β² }] = [2 Γ— {36 + 9 + 25}]= [2 Γ— 70] = 140 397: 282 β†’ [2 Γ— {(3)Β² + (9)Β² + (7)Β² }] = [2 Γ— {9 + 81 + 49}]= [2 Γ— 139] = 278 β‰  282

      Practice Next

      Relevant for Exams:

      ask-question