what is the avareage of series 1,5,9,---,81 ?

if 7 workers can assemble a car in 8 hours, how long would it take 12 workers to assemble the same car?

If the numerator of fraction is increased by 200% and the denominator is increased by 350% The resultant fract...

In a mixture, the ratio of the milk and water is 6:5. When 22 liter mixture is replaced by water, the ratio be...

A man covers a total distance of 100 km on bicycle. For the first 2 hours, the speed was 20 km/hr and for the...

A man can reach a certain place in 40 hours. If he reduces his speed by 1/15th, he goes 5km less in that time....

A shopkeeper gains 17% after allowing a discount of 10% on the marked price of an article. Find his profit per...