1. The constant of variation, if x ∝ y, from the following table is

2. If x = 20 and y = 40, then x and y are:

3. If x = 15 and y = 1/30, then x and y are:

4. If x and y are directly proportional, then which of the following is correct?

5. If x and y are inversely proportional, then:

6. If x ∝ y and x₁= 5, y₁ = 210 and x₂ = 2, then find y₂?

7. If the weight of 12 sheets of thick paper is 40 grams, how many sheets of the same paper would weigh 2500 grams?

8. The scale of a map is given as 1 : 300. Two cities are 4 km apart on the map. The actual distance between them is:

9. If x and y are inversely proportional, then which one is true?

10. 6 pipes are required to fill a tank in 1 hour 20 minutes. If we use 5 such types of pipes, how much time it will take to fill the tank?