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.
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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