Quantitative Aptitude - Arithmetic Ability Questions

The list price of an article is Rs. 900. It is available at two successive discounts of 20% and 10% . The selling price of the article is:

ΔDEF is right angled at E. If m∠D = 45°, then find the value of (tanF + 1/3).

What is the value of [tan (90 – A) + cot (90 – A)]2/[2 sec2(90 – 2A)]?

On dividing a number by 38, we get 70 as quotient and 12 as remainder. What is the number?

If x2+5x+6 = 0, then the value of 2xx2-7x+6 is

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 12% per annum is Rs 900. What is the value of given sum (in Rs)?

To cover a certain distance with a speed of 60 km/hr, a train takes 15 hours. If it covers the same distance in 12 hours, what will be its speed?

Pipe A can empty a filled tank in 28 hours while Pipe B can fill the same tank, when empty in 35 hrs. If alternatively Pipes A and B are turned on for an hour each time, starting when the tank is full, how long will it take to empty the tank?