0
Still curious? Ask our experts.
Chat with our AI personalities
Rafa
Maxine
LaoAdd your answer:
Earn +20 pts
What is is a counterexample for all balls are spheres?
American footballs and Rugby balls are both considered 'balls' but neither are spheres.
What does counter example mean in math terms?
It is an example that demonstrates, by its very existence, that an assertion is false. Usually experience suggests that the assertion is true: there is a large amount of supporting "evidence" but the statement has not been proven. The counter-example, though demolishes the assertion For example: Assertion: all prime numbers are odd. Counter example: 2. It is a prime but it is not odd. Therefore the assertion is false. This was a favourite "trap" at GCSE exams in the UK. Assertion: if you divide a nuber it becomes smaller. Counter example 1: 2 divided by a half is, in fact, 4. Counter example 2: -10 divided by 2 is -5 (which is larger by being less negative).
Are all multiples of 2 multiples of 4?
No. All it needs is one counter example to disprove: 6 is a multiple of 2 but NOT a multiple of 4.
All points on a spheres surface are the same distance from the?
redtube
What are round three dimensional objects whose surface at all points is the same distance away from its center?
all spheres
