Quantitative Aptitude - Arithmetic Ability Questions

Which among the following is true for the given numbers?

A, B and C can do a job working alone in 12, 16 and 24 days respectively. In how many days they can do the job if they worked together?

The average revenues of 9 consecutive years of a company is Rs 65 lakhs. If the average of first 5 years is Rs 60 lakhs and that of last 5 years is Rs 72 lakhs, find the revenue for the 5th year.

If 4r = h + r2+h2 then r: h = ? (r not equal to 0)

Which of the following is correct?

If 5/2 - (6/5)(x - 15/2) = -x/5, then what is the value of x?

What is the value of Cot 45° - (1/√3)Cosec 60°?

What is the value of {sin (90 – x) cos [π – (x – y)]} + {cos (90 – x) sin [π – (y – x)]}?