Four letter-clusters have been given out of which three are alike in some manner and one is different. Select the one that is different.
The second letter is the second preceding letter of the first letter and the third letter is the sixth succeeding letter of the second letter as per the English Alphabetical series. ZXD → Z - 2 = X, X + 6 = D IGK → I - 2 = G, G + 6 = M ≠ K TRX → T - 2 = R, R + 6 = X DBH → D - 2 = B, B + 6 = H
32, 8, 4, ?, 3, 3.75
6 7 15 46 185 ?
...20 910?2971.5
...Select the number from among the given options that can replace the question mark (?) in the following series.
64, 60, 52, 40, ?, 4
13 22 40 67 103 ?
...11 46 109 208 351 ?
32, 65 , 196, 785, ? , 23557
5 ? 205 823 7405 29623
...4 8 12 48 ? 432
...12 36 90 180 270 ?
...
