In each of the following questions, a series is given, with one
term missing. Choose the correct alternative from the given ones that will
complete the series.
61, 52, 63, 94, 46 ?
The numbers in the series are square of consecutive numbers with their digits reversed.
4$$^2$$ = 16 ==> 61
5$$^2$$ = 25 ==>52 and son on.
The last term is 46 ==> 64 ==> 8$$^2$$
Hence the next term must be the reverse of 9$$^2$$ which is 18.
Option B is the correct answer.
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