Question 1 : Both x and y are in direct proportion, then $\frac {1}{x}$ and $\frac {1}{y}$ are

Question 2 : Both x and y vary inversely with each other. When x is 10, y is 6, which of the following is not a possible pair of corresponding values of x and y?

Question 3 : If 45 persons can complete a work in 20 days, then the time taken by 75 persons will be ______ hours.

Question 4 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc9bf59b460d7261edad.PNG' /> In the above figure, a table is shown. This table shows the time four elevators take to travel various distances. Find which elevator is slowest.

Question 5 : When two quantities x and y are in _______ proportion or vary ______ they are written as x ∝ $\frac {1}{y}$.

Question 6 : Choose the correct option. Sales Tax and the amount of the bill

Question 7 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc93f59b460d7261eda3.PNG' /> In the above figure, a table is shown. If a and b vary inversely to each other, then find the value of y.

Question 8 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc9ff59b460d7261edb1.PNG' /> Refer to the above figure. A recipe for a particular type of muffins requires 1 cup of milk and 1.5 cups of chocolates. Riya has 7.5 cups of chocolates. If she is using the recipe as a guide, how many cups of milk will she need to prepare muffins?

Question 9 : Choose the correct option. Distance travelled by an auto-rickshaw and time taken

Question 10 : If x varies inversely as y and when x = 6, y = 8, then for x = 8 the value of y is 10. True or false ?

Question 11 : If x and y are in inverse proportion, then (x + 1) and (y + 1) are also in inverse proportion. True or false ?

Question 12 : If two quantities x and y vary directly with each other, then

Question 13 : Choose the correct option. The number of people working and the quantity of work

Question 14 : 30 persons can reap a field in 17 days. How many more persons should be engaged to reap the same field in 10 days?

Question 15 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cca2f59b460d7261edb5.PNG' /> In the above figure, a key board of a harmonium is given. This pattern of keys is repeated on larger keyboard. How many black keys would you expect to find on a keyboard with 14 such patterns ?

Question 17 : If p and q are in inverse variation then (p + 2) and (q – 2) are also in inverse proportion. True or false ?

Question 18 : Amrita takes 18 hours to travel 720 kilometres. Time taken by her to travel 360 kilometres is _______.

Question 19 : By travelling at a speed of 48 kilometres per hour, a car can finish a certain journey in 10 hours. To cover the same distance in 8 hours, the speed of the car should be

Question 20 : Choose the correct option. The number of people working and the time to complete a given work