The set of real numbers

The set of real numbers and ordering the numbers in R
1
check the equation
2
check the equation
3
check the equation
4
check the equation
5
check the equation
6
check the equation
7
choose the correct answer from a, b, c, or d
8
choose the correct answer from a, b, or c
9
choose the correct answer from a, b, c, or d
10
choose the correct answer from a, b, or c
11
choose the correct answer from a, b, c, or d
12
choose the correct answer from a, or b
13
choose the correct answer from a, b, or c
14
choose the correct answer from a, b or c
15
choose the correct answer from a, b or c
16
Every natural number is an integer
17
zero belongs to the set of rational number
18
Any non-integer number is a rational number