The set A = {2, 3, 5, 7} is equal to which description?
Answer and explanation
Correct answer: Prime natural numbers less than 10
The prime natural numbers less than 10 are 2, 3, 5, and 7. Each of these numbers has exactly two positive factors, while 1 is neither prime nor composite and 4, 6, 8, and 9 are composite. Thus the descriptive set has precisely the elements listed in A, so the two sets are equal.
Frequently asked questions
What is the correct answer to this question?
Prime natural numbers less than 10
Why is this the correct answer?
The prime natural numbers less than 10 are 2, 3, 5, and 7. Each of these numbers has exactly two positive factors, while 1 is neither prime nor composite and 4, 6, 8, and 9 are composite. Thus the descriptive set has precisely the elements listed in A, so the two sets are equal.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Sets. Topic: The Empty Set, Finite and Infinite Sets, Equal Sets.
