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Find the odd one from the following ?

A39

B48

C56

D31

Answer:

D. 31

Read Explanation:

All others are composite numbers.


Related Questions:

Based on the English alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which letter-cluster DOES NOT belong to that group? (Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)
Find the odd man :
Find the odd one
താഴെ കൊടുത്തിരിക്കുന്നവയിൽ വ്യത്യസ്തമായ ഗ്രൂപ്പ് ഏത്?
ഒറ്റയാനേ കണ്ടെത്തുക; 1/2, 3/4 1¼, 2, 3¼, 4¼, 5¾