Question 19
HardOriginal questionWhich diagram best represents the relationship among Odd numbers, Prime numbers and Even numbers?
Show the answer and explanation
Correct answer: C
Explanation
3 is odd and prime, while 9 is odd but not prime and 2 is prime but not odd: Odd numbers and Prime numbers overlap.
2 is even and prime, and 4 is even but not prime: Prime numbers and Even numbers also overlap.
No number is both odd and even: those two circles do not meet.
So the picture is a chain with Prime numbers in the middle, overlapping both of the others.
Worth noting
The trap is to forget 2, the only even prime. Without it you would put Prime numbers inside Odd numbers and choose the small-circle-inside-a-larger-one picture.
- Concept
- The even prime 2 makes Prime overlap Even
- Typical timeTypical
- 120 s
- Your timeYours
- —
Ten questions from Venn Diagrams, at your own pace.