Question
Four number-pairs have been given, out of which three
are alike in some manner and one is different. Select the number-pair that is different.ÂSolution
The logic followed here is: Second number = 2 X First number - 3 (32 – 61) → 32 X 2 = 64 – 3 = 61. (47 – 91) → 47 X 2 = 94 – 3 = 91. (39 – 75) → 39 X 2 = 78 – 3 = 75. (78 – 159) → 78 X 2 = 156 – 3 = 153.
12, 6, 6, 9, 18, ?
77 ? 190 257 331 412
...10 625 50 125 250 25 ?
...90     211     67     236     ?     265
...1335Â Â Â Â Â Â 737Â Â Â Â Â Â Â Â 355Â Â Â Â Â Â Â Â 141Â Â Â Â Â Â Â Â 47Â Â Â Â Â Â Â Â Â Â ?
...Which of the following numbers will replace the question mark (?) in the given series?
69, 70, 74, 83, ?, 124
15Â Â Â Â Â Â Â Â Â Â Â Â 13 Â Â Â Â Â Â Â Â 28 Â Â Â Â Â Â Â Â Â Â Â Â Â Â 24 Â Â Â Â Â Â Â Â Â Â Â Â Â Â 54 Â Â Â Â Â Â Â Â 52
...4, 8, 24, ?, 840, 9240
If 6 4 x 5.75 9,
Then, (x²-1) = ?
...13 22 40 67 103 ?
...
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