UPSC CDS Math Number System Questions

Consider the following statements :
1. √75 is rational number.
2. There exists at least a positive integer x such that −

4x

5

<−

7

8

.
3.

x−2

x

<1 for all real values of x
4. 4.232323..... can be expressed in the form

p

q

where p and q are integers
Which of the above statements ate correct ?