6.The smallest value of n, for which 2n + 1 is not a prime number, is:
[A] 3
[B] 4
[C] 5
[D] None of these
Answer : [B]
Explanation :
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(2 x 1 + 1) = 3, (2 x 2 + 1) = 5, (2 x 3 + 1) = 7. (2 x 4 + 1) = 9. which is not prime. |
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Title : Numbers Q6
Description : 6.The smallest value of n, for which 2n + 1 is not a prime number, is: [A] 3 [B] 4 [C] 5 [D] None of these Answer : [B] Explanation :...
Rating : 5
