Consider this statement:
The number two is a prime number.
Which of the following statements is deducible from the given statement?
A) At least one number is not a prime number.
B) All numbers are prime numbers.
C) At least one prime number exists.
D) No number is a prime number.
E) No prime numbers exist.
IMAT 2025 · Question 5
Q5 - Critical thinking
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The correct answer is C) At least one prime number exists.
If 2 is a prime, then the only thing you can safely conclude is that at least one prime exists.
"At least one number is not prime" is true in real life (4, for example), but it doesn't follow from the statement, which only tells you about the number 2.
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