Which of the following is a non-zero number that belongs to every set: Whole, Integer, Rational, and Real?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 1.
A number that belongs to all four sets (Whole, Integer, Rational, Real) and is non-zero must be:
Whole numbers: 0, 1, 2, 3, …
Integers: …, –2, –1, 0, 1, 2, …
Rational numbers: Can be expressed as p/q, q ≠ 0
Real numbers: All numbers on the number line
Required number = 1