Quantitative Aptitude - Arithmetic Ability Questions

A solid cone of height 24 cm and radius of its base 8 cm is melted to form a solid cylinder of radius 6 cm and height 6 cm. In the whole process what
percent of material is wasted?

Average of all even numbers between 104 and 148 is __________.

On a certain Principal if the Simple interest for two years is Rs 4800 and Compound interest for the two years is Rs 5088, what is the rate of Interest?

The sum of two positive integers is 80 & difference between them is 20. Then what is difference of squares of those numbers ?

If 35% of (x + y) = 40% of (x – y), then x is what percentage of y?

The compound interest earned in two years at 12% per annum is Rs 10176. What is the sum (in Rs) invested?

If a = √2 + 1 and b = √2 - 1, then the value of 1a+1+1b+1 will be

Determine the value of a2+b2a3+b3 when a = 2+√3 and b = 2-√3.