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Find counter-examples to disprove the following statement: A quadrilateral with all angles equal is a square.

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Find counter-examples to disprove the following statement: A quadrilateral with all sides equal is a square.

Find counter-examples to disprove the following statement: 2n^2+ 11 is a prime for all whole numbers n.

Find counter-examples to disprove the following statement: ) For integers a and b, sqrt (a^2 + b^2)= a+b

Find counter-examples to disprove the following statement: If the corresponding angles in two triangles are equal, then the triangles are congruent.

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State whether the following statement is true or false:If a quadrilateral has all its sides equal, then it is a square.

By giving a counter example, show that the following statement is not true:- p: If all the angles of a triangle are equal, then the triangle is an obtuse angled triangle.

Write the converses of the following statement : If triangle ABC is equilateral, then all its interior angles are equal.

By giving a counter example, show that the following statement is not true : p: If the angles of a triangle are equal, then the triangle is an obtuse angled triangle.

PSEB-PROOFS IN MATHEMATICS-EXAMPLE
  1. Find counter-examples to disprove the following statement: A quadrilat...

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  2. State whether the following statement is always true, always false or ...

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  3. State whether the following statement is always true, always false or ...

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  4. State whether the following statement is always true, always false or ...

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  5. State whether the following statement is always true, always false or ...

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  6. State whether the following statement is always true, always false or ...

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  7. State whether the following statement is always true, always false or ...

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  8. State whether the following statement is true or false: The sum of the...

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  9. State whether the following statement is true or false: Every odd numb...

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  10. State whether the following statement is true or false: For any real ...

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  11. State whether the following statement is true or false: For every real...

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  12. State whether the following statement is true or false: For every real...

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  13. State whether the following statement is true or false:If a quadrilate...

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  14. Restate the following statement with appropriate conditions, so that t...

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  15. Restate the following statement with appropriate conditions, so that t...

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  16. Restate the following statement with appropriate conditions, so that t...

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  17. Restate the following statement with appropriate conditions, so that t...

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  18. Restate the following statement with appropriate conditions, so that t...

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  19. Take any three consecutive even numbers and add them, say, 2 + 4 + 6 =...

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  20. Observe the following pattern of numbers which is also called Pascaltr...

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  21. Consider the so-called triangular numbers Tn : The dots here are arr...

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