Question
Download Solution PDFThree of the following four triads are alike in a certain way as they are formed by performing same mathematical operations among themselves and thus form a group. Which triad does NOT belong to that group?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFLogic: [(First no.) : {(First no. × 2) - 1} : (First no.)2]
Checking all the given options:
(1) 11 : 21 : 121 → [(11) : {(11 × 2) - 1} : (11)2]
(2) 2 : 3 : 4 → [(2) : {(2 × 2) - 1} : (2)2]
(3) 7 : 15 : 49 → [(7) : {(7 × 2) + 1} : (7)2]
(4) 9 : 17 : 81 → [(9) : {(9 × 2) - 1} : (9)2]
Here, in (7 : 15 : 49) different logic is followed.
Hence, the correct answer is "7 : 15 : 49".
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