Quantitative Aptitude - Arithmetic Ability Questions

50 litre mixture of water and alcohol contains 10% alcohol. How much more alcohol must be added to make the strength of alcohol 40% in the new mixture?

In a cricket match, the scores of the players are considered such that coefficient of variation of scores is 16 and mean is 25 then the variance is

3 hrs after a goods train passed a station, another train travelling at a speed of 88 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?

In ΔXYZ measure of angle Y is 90°. If cosecX = 17/15, and XY = 4cm, then what is the length (in cm) of side YZ?

The price of a shirt after 15% discount, is Rs.119. What was the marked price of the shirt before discount

Square of (3x – 5xy) is

If  C+1C = 3, then what is the value of C3+1C3 = ?

The area of a circle is 616 sq.m. Find its diameter.