Question : The ratio of speed of the three racers is 5 : 2 : 1. What is the respective ratio of time taken by the three racers to cover the same distance?

Option 1: 2 : 5 : 10

Option 2: 2 : 5 : 8

Option 3: 5 : 2 : 10

Option 4: 2 : 5 : 3

Question : If the ratio of the volumes of two cylinders is 7 : 5 and the ratio of their heights is 5 : 7, then what is the ratio of their radii?

Option 1: 5 : 7

Option 2: 3 : 4

Option 3: 5 : 9

Option 4: 4 : 5

Question : The lengths, the breadths, and the volumes of two cuboids are in the ratios of 4 : 5, 3 : 4, and 2 : 3, respectively. What is the ratio of their heights?

Option 1: 3 : 5

Option 2: 10 : 9

Option 3: 8 : 15

Option 4: 2 : 3

Question : The three racers' speed ratio is 3 : 2 : 4. What is the respective ratio of time taken by the three racers to cover the same distance?

Option 1: 6 : 8 : 9

Option 2: 4 : 8 : 5

Option 3: 10 : 8 : 3

Option 4: 4 : 6 : 3

Question : What is the value of $4^{2}-3^{2}+6^{2}-5^{2}+8^{2}-7^{2}$?

Option 1: 30

Option 2: 33

Option 3: 3

Option 4: 27