Interview Maths Puzzle Numerical Ability

Q.Which of the following is the prime Number?

A)2181
B)3585
c)4587
D)3931

Read Solution (Total 2)

d
1 and itself is a factor of 3931 .hence,it is a prime number
9 years agoHelpfull: Yes(1) No(2)

2+1+8+1=12
3+5+8+5=21
4+5+8+7=24
3+9+3+1=16

so,,Ans is 3583
9 years agoHelpfull: Yes(0) No(4)

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