state gov RPSC 2nd Grade Senior Teacher Mock Test Series 2025 Quantitative Aptitude Number System Real Number
Which of the following statements is not true for the set of whole numbers?
1
a + b = b + a
2
a – b = b – a
3
a × b = b × a
4
(a + b ) + c = a + (b + c)
5
Question Not Attempted