Quantitative Aptitude - Arithmetic Ability Questions

If the radius of a circle is decreased to 25% of its original value, calculate the percentage decrease in the area of the circle

If a = √2 + 1, b = √2 - 1 then the value of 1a+1+1b+1 ?

If A = (-14 + 4) and B = 4 - 14, then AB = 

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

A right prism has a square base with side of base 4 cm and the height of prism is 9 cm. The prism is cut in three parts of equal heights by two planes parallel to its base. What is the ratio of the volume of the top, middle and the bottom part respectively?

A milkman buys milk at Rs 25 per litre and adds 1/4 of water to it and sells the mixture at Rs 26 per litre. His gain (in %) is?

If a merchant offers a discount of 20% on the list price, then he makes a loss of 10%. What % profit or % loss will she make if he sells at a discount of 5% of the list price?

A Rs 1000 box of cookies is offered at 10% discount and a Rs 400 bar of chocolate at 8% discount. If we buy 2 boxes of cookies and 3 bars of chocolate, what is the effective discount we get (in %)?