INC Counterexamples and Conjectures
Flashcard
•
Mathematics
•
9th Grade
•
Hard
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a counterexample?
Back
A counterexample is an example that disproves a conjecture or statement.
2.
FLASHCARD QUESTION
Front
If it is an angle, then it is acute. What is a counterexample?
Back
120° is a counterexample because it is an angle that is not acute.
Tags
CCSS.7.G.B.5
3.
FLASHCARD QUESTION
Front
True or False: A counterexample proves a conjecture to be true.
Back
False. A counterexample disproves a conjecture.
4.
FLASHCARD QUESTION
Front
True or False: To disprove a conjecture, only one counterexample is needed.
Back
True. One counterexample is sufficient to disprove a conjecture.
5.
FLASHCARD QUESTION
Front
What is the next term in the sequence: 1, 3, 7, 15, 31, ___?
Back
63 is the next term.
Tags
CCSS.HSF.BF.A.2
6.
FLASHCARD QUESTION
Front
What is the next term in the sequence: 1, 3, 7, 15, 31, 63, ___?
Back
127 is the next term.
Tags
CCSS.HSF.BF.A.2
7.
FLASHCARD QUESTION
Front
If an animal is furry, then it is a hamster. What is a counterexample?
Back
A cat is a counterexample because it is furry but not a hamster.
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