Quantitative Aptitude - Arithmetic Ability Questions

A can do a piece of work in 10 days, B can do it in 12 days and C can do it in 15 days. In how many days will A, B and C finish it, working all together?

The total surface area of a hemisphere is 4158 cm2. Find its diameter (in cm).

A can complete a work in 20 days and B can complete the same work in 25 days. If both of them work together, then in 3 days what percent of the total work will be completed?

Convert binary 1101111 to decimal.

When 0.151515.....is converted into a fraction, then the result is

ABC is a right angled triangle. ∠BAC = 90 deg and ∠ACB = 60 deg. What is the ratio of the circum radius of the triangle to the side AB?

If 123 x 356 = 43788, then 1.23 x 0.356 = ?

If 5x ­- 3(4 ­ x) < 4x -­ 4 < 4x + 2x/3; then the value of x is