Which of the following statements is true? (r is a positive integer)

1. If p ≥ q, then $-\dfrac{p}{r} \le -\dfrac{q}{r}$

2. If p ≤ q then pr ≥ qr

3. If p > q, then -pr > -qr

4. If p < q then p - r > q - r

Graphical representation of following inequation on the number line is {x : -3 < x < 2, x ∈ I}

1.

2.

3.

4.

Which of the following is the correct graphical representation of {x : -4 < x ≤ 2, x ∈ R} on the number line?

1.

2.

3.

4.

The solution set of 4x - 3 ≤ 5, where x ∈ N, is :

1. {1}

2. {1, 2}

3. {0, 1, 3}

4. none of these