Find the odd one out 41 43 47 53 61 71 73 81 ........

Quantitative Aptitiude (CLAT) Mixture and Alligation

Find the odd one out :

41,43,47,53, 61, 71, 73,81

Here, in the above series each of the numbers except 81 is a Prime number.
So, 81 is wrong number.
Hence, option D is correct.

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