A dishonest milk-vendor has a vessel filled with 50 L of milk. From which he has taken out 5 L of milk and replaced it with same quantity of water. This process has been further repeated 2 times. How much is the quantity of pure milk that is now contained in the vessel?

A fashions house is having a clearance sale on trousers. During the first week 40% discount is offered; a subsequent discount of 20% is offered in the second week; and finally in the third week, another 10% discount is offered on the original price in order to clear the stock. Am…

27 cubes having side 2 cm are joined together to form a bigger cube. The surface area of the resulting cube is:

In x-y axis graph, which linear equation would plot as follows? (The line cuts the y-axis at 3 and the x-axis at 9.) [Figure: see page 7 of source PDF]

Monika, a fashion designer buys 5 scarfs and 2 bags for Rs.3700. Her friend Asha buys 3 scarfs and one bag of the same kind for Rs.2000. What is the total cost of 3 bags?

An employee wishes to reach his office, which is 27 km away, in 48 min. He covers one-third of the distance in 12 min. What must his speed be so that he is able to cover the remaining distance in the remaining time?

In how many different ways can the letters of the word DESIGNING be arranged?

Geeta and Rahul are working in a boutique. Their combined monthly salary amounts to Rs.30,000. Geeta spends 80% of her salary and Rahul spends 70% of his salary. If their savings are equal in amount, what is the salary of Geeta?

At what rate of simple (annual) interest does a sum of money double itself in 12 years?