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ഒറ്റയാൻ ഏത് ? 61,71,41,91

A61

B71

C41

D91

Answer:

D. 91

Read Explanation:

91 is not a prime number


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ഒറ്റയാൻ ആര് ?
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.)
Identify the number which does not satisfy: Sum of digits is a divisor of the number.