If one angle is half of its complementary angle, find that angle.

The total surface area of a cube is 864 square cm. What will be its volume?

The numerator of a fraction is 4 less than its denominator. If the numerator is decreased by 2 and the denominator is increased by 1, the denominator becomes eight times the numerator. Find the fraction? 

The single discount which is equivalent to three successive discounts of 25%, 20% and 10% is-

X, Y and Z take 18 days to complete a piece of work. If X works alone he finishes the work in 36 days and if Y works alone he finishes it in 60 days. How long will it take Z to complete the work alone?

If 3 added to both the numerator and the denominator, the fraction becomes 10/11 when 4 is subtracted from both the 4 numerator and the denominator of the same fraction, it becomes ¾. What is the value of the fraction?

30 persons can do a piece of work in 24 days. How many more people are required to complete the work in 20 days?

If A: B = 4:5 and B:C= 3: 7 . What is the value of C:A?