Quantitative Aptitude - Arithmetic Ability Questions

2 litre of pure alcohol is added to 6 litre, 40% alcohol solution. The percentage of water in the solution is _____ .

Asif is twice as good as workman as Bashir and together they finish a piece of work in 30 days. In how many days will Asif alone finish the work?

Pramod can paint a wall red in 12 hours while Brajen can whitewash the wall completely in 16 hrs. If Pramod and Brajen work alternately for an hour each starting when the wall has just cement on it till when it is completely painted red, how many hours will it take to paint the entire wall red?

A train crosses a 375 m long platform in 27 seconds. How long was the train if it was travelling at the speed of 70 kmph?

Sound travels at 330 metres per second. The distance (in kilometres) of a thunder cloud when its sound follows the flash after 10 seconds

What is the remainder, when 4x4 +10x3-20x2+90 is divided by (x+2) ?

In an ornament the ratio of gold and copper is 3:2. The percentage of gold in the ornament is:

∆ABC is right angled at B. If m∠A = 30°., then Sec C =?