Question
Download Solution PDFThe second number in the given number-pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) is/are followed in all the number-pairs except one. Find that odd number-pair.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFLogic: First no. = [(Second no.)2 - 2]
Checking all the given options:
(1) 80 : 9 →
⇒ [(9)2 - 1]
⇒ (81 - 1) = 80
(2) 142 : 12 →
⇒ [(12)2 - 2]
⇒ (144 - 2) = 142
(3) 23 : 5 →
⇒ [(5)2 - 2]
⇒ (25 - 2) = 23
(4) 7 : 3 →
⇒ [(3)2 - 2]
⇒ (9 - 2) = 7
Here, in '80 : 9' different logic is followed.
Hence, the correct answer is "Option (1)".
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