Which is the roster form of N = {x : x is a digit}?
Answer and explanation
Correct answer: N = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
In the decimal number system, a digit is one of the ten symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9. Roster notation lists every member explicitly, so N must contain all ten symbols from 0 through 9. Zero is a digit even if some conventions begin the natural numbers at 1. Thus option B is correct.
Frequently asked questions
What is the correct answer to this question?
N = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
Why is this the correct answer?
In the decimal number system, a digit is one of the ten symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9. Roster notation lists every member explicitly, so N must contain all ten symbols from 0 through 9. Zero is a digit even if some conventions begin the natural numbers at 1. Thus option B is correct.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Common Questions. Topic: General chapter practice.
