Quantitative Aptitude - Arithmetic Ability Questions

P and Q can complete a task in 50 and 20 days respectively. In how many days can they complete 70% of the task if they work together?

The ten's digit of a 2­digit number is greater than the units digit by 4. If we subtract 36 from the number, the new number obtained is a number formed by interchange of the digits. Find the number.

The average runs conceded by a bowler in 5 matches is 45 and 15.75 in other 4 matches. What is the average runs conceded by the bowler in 9 matches?

The price of an article is discounted by 25%, to restore to its original value, the new price must be increased by

What is the compound interest earned on Rs 80,000 at 40% per annum in 1 year compounded quarterly?

If x + y = 12 and x2 + y2 = 94, then xy is 

Find the circumference (in cm) of a circle of radius 10.5 cm

In ΔXYZ measure of angle Y is 90 deg. If cot X = 5/12, and XY = 2.5 cm, then what is the length (in cm) of side XZ?