What is the math definition for 'counterexample'? When is counterexample used?

1 answer:

7 0

A counterexample is something that proves a statement, or equation, wrong. A counterexample is used in math when someone creates a theorem, writes an equation, or creates a new rule and someone proves it to be false.

For Example:
Let's say that I said an even number plus an odd number always equals an even number. A counterexample of that would be 4 + 5 = 9, because 9 is odd, therefore proving the statement wrong.

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The price of a pair of shoes increases from $55 to $77. What is the percent increase to the nearest percent?

Rom4ik [11]

Answer:

40%

Step-by-step explanation:

40% of 55 is 22 and 55+22=77

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Answer:

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Step-by-step explanation:

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Afina-wow [57]

Answer:

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Step-by-step explanation:

Since we have 1 crate and 8 boxes fit into one crate.

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2-3 12 INCH RULERS
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