2013 · Q27
The set of natural numbers is closed under
- 1addition
- 2subtraction
- 3multiplication
- 4division
Which of the above is/are correct?
Elementary MathematicsNumber System
- A1 only
- B1 and 3 only
- C1, 2 and 3
- D3 and 4 only
Explanation
Natural numbers closed under addition and multiplication only. Answer B.