Quantitative Aptitude - Arithmetic Ability Questions

X and Y undertook to do a piece of work for Rs 5400. X alone could do this work in 18 days and Y alone could do this work in 24 days. With the assistance of Z they finished the work in 8 days. What is the share (in Rs) of Z?

What is the average of all natural numbers from 21 to 39?

A rectangular swimming pool of length 20 m and breadth 10 m has a uniformly sloping floor. It is 1 m in depth on one end of its length and 3 m at the other. How much water is needed to completely fill this pool? (Take π = 22/7)

What is the y – intercept of the linear equation 59x + 14y – 112 = 0?

cot3A is equal to

If ab-1b=cb-1c=ac-1a, then ac+ba+cb

If P/Q = R/S = T/U = 3/4 is (4P + 5R + 7T) : (3Q + 4S + 7U)?

By what fraction selling price (S.P.) must be multiplied to get the cost price (C.P.) if the loss is 20% ?