P and Q can do a project in 6 and 12 days respectively. In how many days can they complete 25% of the project if they work together?

A line passing through the origin perpendicularly cuts the line 2x + 3y = 6 at point M. Find M?

Find co-ordinates of the mid point of the segment joining points C (3,-5) and D (-7,3).

4 hrs after a goods train passed a station, another train travelling at a speed of 72 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 8 hours. What is the speed of the goods train?

If sinC + sinD =X, then the value of X is?

The average weight of Somdev, Gurdeep and Ritu is 85 kg. If the average weight of Somdev and Gurdeep be 79 kg and that of Gurdeep and Ritu be 73 kg, then the weight of Gurdeep is

Product of digits of a 2-digit number is 18. If we add 63 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.

If sin 30° + cos 45° = X, then the value of X.