Quantitative Aptitude - Arithmetic Ability Questions

Nine students of a class contribute a certain sum of money. Seven of them gave Rs. 50 each and the other two gave respectively Rs. 50 and Rs. 90 more than the others. The average contribution of the class of 9 students is

A can do a work in 15 days and B in 9 days. If they work on it together for 5 days, then what fraction of work is left?

If the true discount on sum due 2 years hence at 14% per annum be Rs. 168, the sum due is

At what time between 4 o'clock and 5 o'clock will the two hands of the clock be at the right angle to each other for the first time?

(secA ­- tanA)/(cosecA + cotA) is equal to

Rajeev sells a machine for Rs 55 lakhs at a loss. Had he sold it for Rs 67 lakh, his gain would have been 5 times the former loss. Find the cost price of the machine.

In a container, there is 960 ltr of pure milk from which 48 ltr of milk is replaced with 48 ltr of water, again 48 ltr milk is replaced by same amount of water, as this process is done once more. Now, what is the amount of pure milk?

Painter A can paint a house in 40 days and Painter B can do it in 60 days. With help of C, they did the job in 20 days only. Then, C alone can do the job in