In the folowing questions pickout the most sutiable substitute for the question mark?
6 : 222 :: 25 : ?
63+6=222
Similarly , 253+25=15650
In the following question, select the missing number from the given series.
25, 33, 42, 52, 63, ?
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4, 5, 12, 39, 160, ?
44, 40, 36, ?, 28, 24
18, 37, 76, 155, 314, ?
113, 116, 119, 122, 125, ?
15, 7.5, 7.5, ?, 22.5, 56.25
2, 5, 9, 14, 20, ?
9, 16, 13, 12, 17, 8, ?, ?