Sin (90° – x) equals? 

What is the sum of two numbers if the HCF of the two numbers, each having three digits, is 17 and their LCM is 714?

An article was sold at a 24% discount, and the selling price was Rs.912. Find the actual cost of the article.

 The difference between simple and compound interest for the fourth year is Rs. 7280 at 20% p.a. What is the principal sum? 

A box contains 9 bulbs, of which 4 are defective. If 4 bulbs are chosen at random, find the probability that exactly 3 bulbs are good.

A right triangle with sides 3 cm, 4 cm and 5 cm is rotated the side of 3 cm to form a cone. The volume of the cone so formed is:

Three candidates in an election received 1,136, 7,636 and 11,628 votes respectively. What percentage of the total votes did the winning candidate get?

A train with a length of 110 m is traveling at a speed of 80 km/h. How much time does the train take to pass a man walking at 8 km/h in the opposite direction, in seconds?

  A cistern is normally filled with water in 10 hours but takes 5 hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty the cistern in
 

Train P crosses a pole in 30 seconds and train Q crosses the same pole in one minute and 15 seconds. The length of train P is three-fourths the length of train Q. What is the ratio of the speed of train P to that of train Q?