Mathematics
Grade 9
15 min
Counterexamples
Counterexamples
Tutorial Preview
1
Find a counterexample: 'If a number is odd, then it is prime.'
2
Find a counterexample: 'If a shape has four sides, it is a square.'
3
Find a counterexample: 'For all numbers x, x² is greater than x.'
Sample Practice Questions
Easy
Find a counterexample for the statement: 'All odd numbers are prime.'
0.7
1.11
2.15
3.13
Easy
Find a counterexample for the statement: 'All shapes with four sides are squares.'
0.Square
1.Rectangle
2.Circle
3.Triangle
Easy
Find a counterexample for the statement: 'For all numbers x, x² > x.'
0.2
1.10
2.5
3.0.5
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