If O={x:x∈N, x≤10, x is divisible by 2 or 5}, what is O?
Answer and explanation
Correct answer: O={2,4,5,6,8,10}
List the natural numbers at most 10 divisible by 2: 2, 4, 6, 8, and 10. Those divisible by 5 are 5 and 10. The word “or” means take the union of both lists, writing the shared value 10 only once. Thus O={2,4,5,6,8,10}, so option A is correct. B and C show only one condition, while D omits 10.
Frequently asked questions
What is the correct answer to this question?
O={2,4,5,6,8,10}
Why is this the correct answer?
List the natural numbers at most 10 divisible by 2: 2, 4, 6, 8, and 10. Those divisible by 5 are 5 and 10. The word “or” means take the union of both lists, writing the shared value 10 only once. Thus O={2,4,5,6,8,10}, so option A is correct. B and C show only one condition, while D omits 10.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems.
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