If cost price of 5 cars is equal to selling price of 4 cars. Find the percentage of profit or loss?

The mean of 22 observations is 10. Two more observations are included and the new mean becomes 11. The mean of two new observations is

A tank can be filled in 30 minutes. There is a leakage which can empty the tank in 90 minutes. Therefore, the tank will be filled in

What number should be deducted from 1265 to make it divisible by 29 exactly?

An angle is 30° more than one half of its complement. Find difference between the greater and the smaller angles.