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Directions : In each of the following questions, five numbers are given. Out of these, four are alike in a certain way but the rest one is different. Choose the one which is different from the rest four.



Find out the odd number?
Options:
A .  13
B .  17
C .  23
D .  37
E .  73
Answer: Option C
Answer: (c)
Each of the given numbers is a prime number. But the number obtained on reversing the digits of each of the numbers except 23, is also a prime number.

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