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Counter example to "2n^2 +11 is a prime"...

Counter example to "`2n^2 +11` is a prime" is

A

3

B

4

C

5

D

11

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VGS PUBLICATION-BRILLIANT-PROOFS IN MATHEMATICS-EXERCISE
  1. A counter example to the statement "In any right triangle the square o...

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  2. "A circle may be drawn with any centre and radius" is

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  3. A false axiom results into a.....

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  4. If in a collection of axioms, one axiom can be used to prove other axi...

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  5. If a statement and its negation both are true, then it is a

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  6. A process which can establish the truth of a mathematical statement ba...

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  7. The product of any two consecutive even natural numbers is divisible b...

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  8. Counter example to "2n^2 +11 is a prime" is

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  9. Find counter examples to disprove the statements: A quadrilateral wit...

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  10. We prove the statement "sum of interior angles of a triangle is 180^@"...

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  11. Statement which are assumed to be true without proof are

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  12. If x is odd, then 'x^2' is

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  13. A sentence which is clearly true or false but not both is called a

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  14. Which of the following is not a mathematical statements?

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  15. A statement of idea which gives an explanation to a sense of observati...

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  16. The great Indian mathematician is

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  17. Which of the following subjects is based on inductive reasoning?

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  18. Which of the following statement is always false?

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  19. The very helpful technique for marking conjecture is

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  20. Which of the following is a theorem?

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