Quantitative Aptitude - Arithmetic Ability Questions

Kaushik bought a toy for Rs. 160 and sold it for Rs. 180. The rate of profit was ___%.

Two trains are moving in opposite directions with the same speed. If the length of each train is 144 metres and they cross each other in 9 seconds, then what is the speed (in km/hr) of each train?

Average marks obtained by 19 boys of a college is 56. If the highest marks and lowest marks obtained are removed, then the average reduces by 2. What is the average of the highest and lowest marks obtained?

The product of two numbers is 0.324. One of the numbers is 1.2. What is the other number?

Calculate the sum of squares from 1 to 9.

What is the square root of 9409?

How many times does the number 5 occur in the range of numbers from 1 to 100?

The amount of extension in a spring is proportional to the weight hung on it. If the weight of 5 kgs produces an extension of 0.4 cm, what weight would produce an extension of 5cm?