Quantitative Aptitude - Arithmetic Ability Questions

The average of 15 numbers is 7. If the average of the first 8 numbers is 6.5 and the average of the last 8 numbers is 8.5 then middle number is

What is the simplified value of (cotA + tan B)/(cot B + tan A)?

Calculate the area (in cm2) of a circle of radius 17.5 cm.

Veer spends 15% of his monthly income on the house rent and 60% of the rest on household expenditure. If he saves Rs. 2210, what is his monthly income?

If a sum of money deposited in a bank at simple interest is doubled in 6 years, then after 12 years, the amount will be

The point P(5,-2) divides the segment joining the points (x,0) and (0,y) in the ratio 2:5. What is the value of x and y?

Ramu can row 9 kmph in still water. It takes him twice as long to row up as to row down. Find the rate of stream.

Three clocks are designed to alarm in every hour, two hours and three hours respectively. If they all alrmed together three hours before, then after how many hours will they next alarm together?