I think of a number x, add 5 to it. The result is then multiplied by 2 and the final result is 24. The correct algebraic statement is

1. x + 5 × 2 = 24

2. (x + 5) × 2 = 24

3. 2 × x + 5 = 24

4. x + 5 = 2 × 24

If each matchbox contains 48 matchsticks, then the number of matchsticks required to fill n such boxes is

1. 48 + n

2. 48 − n

3. 48 ÷ n

4. 48 n

If the perimeter of a regular hexagon is x metres, then the length of each of its sides is

1. (x + 6) metres

2. (x − 6) metres

3. (x ÷ 6) metres

4. (6 ÷ x) metres