Quantitative Aptitude - Arithmetic Ability Questions

In a school 60% of the students are girls. If number of boys is 480, then what is the total number of students in the school?

If 2 pair of trouser is offered free on purchase of 3 pair of trousers priced Rs 900 each what is the effective discount on each pair of trouser?

If 1/2 is added to a number and the sum is multipled by 3, the result is 21. Then the number is

A man travelled a distance of 61 km. in 9 hours , partly by walking at speed of 4 km / hr and partly on bicycle at speed of 9 km / hr. The distance covered by walking is

A mason can build a wall in 70 hours. After 7 hours he takes a break. What fraction of the wall is yet to be built?

A can do a work in 15 days and B in 20 days. If they work on it together for 5 days, then what fraction of work is left?

What is the average of all natural numbers from 21 to 39?

The distance between places U and V is 1008 km. An express train leaves place U at 9:00 a.m. and runs at a speed of 126 km/hr. The train stops on the way for 20 minutes. At what time (in p.m.) the train will reach at the place V?