Which option is the roster form of O = {x : x is an even whole number and x < 7}?
Answer and explanation
Correct answer: O = {0, 2, 4, 6}
Whole numbers begin with 0, and even numbers are divisible by 2. Listing the even whole numbers less than 7 gives 0, 2, 4, and 6. The number 7 is excluded because the condition is strictly less than 7. Option B wrongly omits 0, while C includes odd numbers and D includes 8, which is not less than 7.
Frequently asked questions
What is the correct answer to this question?
O = {0, 2, 4, 6}
Why is this the correct answer?
Whole numbers begin with 0, and even numbers are divisible by 2. Listing the even whole numbers less than 7 gives 0, 2, 4, and 6. The number 7 is excluded because the condition is strictly less than 7. Option B wrongly omits 0, while C includes odd numbers and D includes 8, which is not less than 7.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Common Questions.
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