Quantitative Aptitude - Arithmetic Ability Questions

In a number system, on dividing 11509 by a certain number, Mukesh gets 71 as quotient and 7 as remainder. What is the divisor?

Two pipes P and Q can fill an empty tank in 25 hours and 20 hours respectively. Pipe R alone can empty the completely filled tank in 50 hours. Firstly both the pipes P and Q are opened and after 8 hours pipe R is also opened. What will be the total time (in hours) taken to completely fill the tank?

The length of a chord which is at a distance of 5cm from the centre of a circle of radius 13cm is

The successive discount of 15%, 20% and 25% on an article is equivalent to the single discount of

The perimeter and the breadth of a rectangle are 68 cm and 10 cm respectively. Calculate the length of its diagonal (in cm).

The value of sec2θ + 2tanθcotθ - tan2θ is

A circle has points P, Q, R on a circle in such a way that angle PQR is 60 deg and angle QRP is 80 deg. Calculate the angle subtended by an arc QR at the centre.

Calculate the ratio of the area of two similar triangles if the sides of the triangles are in the ratio of 9:4.