Which one of the following is not a prime number?
A. 31
B. 61
C. 71
D. 91
E. None of these
Answer: Option D
Solution (By Examveda Team)
91 is divisible by 7. So, it is not a prime number.This Question Belongs to Arithmetic Ability >> Number System
Related Questions on Number System
Three numbers are in ratio 1 : 2 : 3 and HCF is 12. The numbers are:
A. 12, 24, 36
B. 11, 22, 33
C. 12, 24, 32
D. 5, 10, 15
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