Brain Teasers
A Number
There are 20 players in Maxvu's sports team, numbering from 1 to 20. What is Maxvu's number? Of the choices below, only one is correct.
A. an odd number
B. an even number
C. a prime number
D. a composite number
A. an odd number
B. an even number
C. a prime number
D. a composite number
Answer
It's easily seen that one of A and B must be correct, as a number is either odd or even. This means that neither C nor D is correct. If a number is neither prime nor composite, it can only be 1, so choice A is correct.Hide Answer Show Answer
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Comments
the easeist way to figure it out is if it's his team he would be the first number 1 odd
Enjoyed it! (Figured it out pretty quickly, but then again I used to teach math.)
0 is also neither prime nor composite, but who cares 'bout zilch these days .
I think this should be in the Math section...
All I know is that with 20 players, Maxvu (?) will not see too much playing time !!! Maxvu ???
Well don't I feel stupid... I don't even know what a composite number is.
Thanks for the morning brain workout.
Thanks for the morning brain workout.
Really neat concept, but very simple. I was so intrigued at the idea, that since i could not remember what a composite number is either, I looked it up. right after I read the definition, the answer was obvious.
Odd number could be composite or prime number too. The answer isn't guessable
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