Quantitative Aptitude - Arithmetic Ability Questions

What is the effective discount on two successive discounts of 20% and 25%?

On dividing 8a2b2c2 by 4a2, we get

In the following question, select the odd number from the given alternatives.

Two pipes X and Y can fill an empty tank in 16 hours and 20 hours respectively. Pipe Z alone can empty the completely filled tank in 25 hours. Firstly both pipes X and Y are opened and after 6 hours pipe Z is also opened. What will be the total time (in hours) taken to completely fill the tank?

A closed wooden rectangular box made of 1 cm thick wood has the following outer dimensions : length 22 cm, breadth 17 cm, and height 12cm. It is filled to capacity with cement. What is the volume of the cement in the box?

Find the remainder when 413 divided by 3?

An equilateral triangle ABC is inscribed in a circle of radius 20√3.
What is the length of the side of the triangle?

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.