Which option correctly represents T={2,3,5,7}?
Answer and explanation
Correct answer: T={x: x is a prime number less than 10}
The governing idea is set-builder description: a condition must produce every member of the given set and no extra member. The prime numbers less than 10 are exactly 2, 3, 5, and 7, so option A matches T. Odd numbers would also include 1 and 9; even numbers would include 2, 4, 6, and 8; divisors of 10 are 1, 2, 5, and 10. Therefore A is unambiguous.
Frequently asked questions
What is the correct answer to this question?
T={x: x is a prime number less than 10}
Why is this the correct answer?
The governing idea is set-builder description: a condition must produce every member of the given set and no extra member. The prime numbers less than 10 are exactly 2, 3, 5, and 7, so option A matches T. Odd numbers would also include 1 and 9; even numbers would include 2, 4, 6, and 8; divisors of 10 are 1, 2, 5, and 10. Therefore A is unambiguous.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Common Questions. Topic: General chapter practice.
