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) are followed in all the number-pairs EXCEPT one. Find that odd number-pair.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe logic followed here is:
OPTION 1) 4 ∶ 48
43 - 42 = 48
64 - 16 = 48
OPTION 2) 6 ∶ 180
63 - 62 = 180
216 - 36 = 180
OPTION 3) 8 ∶ 448
83 - 82 = 448
512 - 64 = 448
OPTION4) 9 ∶ 639
93 - 92 = 648
729 - 81 = 648
639 is not equal to 648.
As it should be 648 and not 639, it will be the odd number - pair.
Hence, the correct answer is 9 ∶ 639.
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