Quantitative Aptitude - Arithmetic Ability Questions

What is the fourth proportional to 72, 168 and 150?

A wholesaler sells a watch to a retailer at a gain of 35% and the retailer sells it to a customer at a loss of 25%. If the customer pays Rs 2379.375, what had it cost the wholesaler?

Sashi can do a piece of work in 20 days. Tanya is 25% more efficient than Sashi. The number of days taken by Tanya to do the same piece of work is:

In a class, average height of all students is 'a' cms. Among them, average height of 10 students is 'b' cms and the average height of the remaining students is 'c' cms. Find the number of students in the class. (Here a>c and b>c )

A dealer marks a washing machine for Rs. 7500, and allows a discount of 6% on it. Find the selling price

If x + (1/x) = 2, then what is the value of x21 + (1/x1331)?

If Cot θ = 21/20, then what is the value of Sec θ?

Mr. Mike borrowed Rs. 8500 at 4% per annum C.I. The C.I. compounded annally for 2 years is :