Which description correctly represents U = {5, 10, 15, 20, 25}?
Answer and explanation
Correct answer: Positive multiples of 5 up to 25
Each listed number is a positive multiple of 5: 5, 10, 15, 20 and 25. Because 25 is included, the description must say up to 25, which includes the endpoint. “Less than 25” would stop at 20, “up to 20” would omit 25, and the factors of 25 greater than 5 would not produce this list. Therefore A is correct.
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What is the correct answer to this question?
Positive multiples of 5 up to 25
Why is this the correct answer?
Each listed number is a positive multiple of 5: 5, 10, 15, 20 and 25. Because 25 is included, the description must say up to 25, which includes the endpoint. “Less than 25” would stop at 20, “up to 20” would omit 25, and the factors of 25 greater than 5 would not produce this list. Therefore A is correct.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems.
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