Which pair of lines can never meet?

1. Perpendicular lines

2. Intersecting lines

3. Parallel lines

4. Slanting lines

How many lines of symmetry does an equilateral triangle have?

1. 1

2. 2

3. 3

4. 4

The median of the data set 4, 7, 3, 9, 5 is

1. 4

2. 5

3. 7

4. 3

The average (mean) of the first five even numbers is

1. 6

2. 7

3. 8

4. 5