Quantitative Aptitude - Arithmetic Ability Questions

Mahesh buys a watch of Rs 300 and sells it. Mahesh gives two successive discount of 15% and 6% to the buyer. What will be the selling price (in Rs) ofthe watch?

The sum of the ages of husband and wife at present is 56. Ten years ago the product of their ages was 320. What is the age of the husband and the wife?

X, Y and Z can do a piece of work in 30, 40 and 50 days respectively. All three of them began the work together but Y left 4 days before completion of the work. In how many days was the work completed?

Smita can finish a work in 12 days and Sam can finish the same work in 9 days. After working together for 4 days they both leave the job. What is the fraction of unfinished work?

If x + (1/x) = √13, then what is the value of x5 – (1/x5)?

When a discount of 25% is given on a box of popcorn, the profit is 25%. If the discount is 10%, then the profit is

What is the value of 1/√2 Cot 30° + 1/√3 Cosec 60°?

If 7A = 5B = 2C; find A : B : C.