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Mathematics

9th -

12thgrade

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Counterexamples

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20 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt

    Which is a counterexample to the following statement?


    If you add two numbers, then the sum is odd.

    2+5=7

    3+2=5

    2+4=6

  • 2. Multiple Choice
    30 seconds
    1 pt

    What is the next term in the sequence?


    2, 5, 8, 11, 14, ...

    17

    15

  • 3. Multiple Choice
    30 seconds
    1 pt

    Which of the following is a counterexample to the following conjecture? If  x2 = 4x^2\ =\ 4 , then x = 2

    x = 4

    x = -2

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