Quantitative Aptitude - Arithmetic Ability Questions

The selling price of an article is 8/5th of its cost price. Then the gain percentage is

If the perimeter of a semicircle is 36 cm, then find its area (in cm2).

α and β are the roots of the quadratic equation x2 – x – 1 = 0. What is the value of α8 + β8?

Wheat costing Rs 30/kg, Rs 35/kg and a third variety of wheat are mixed in the ratio of 3 : 4 : 2. If the mixture is costs Rs 34/kg, then what will be the cost (in Rs/kg) of the third variety of wheat?

Working 5 hours a day, Shivam can read a book in 24 days. How many hours a day should he work so as to finish the same work in 8 days?

Three pipe P, Q and R can fill a tank in 12 minutes, 18 minutesand 24 minutes respectively. The pipe R is closed 12 minutesbefore the tank is filled. In what time the tank is full?

Which one of the following is the minimum value of the sum of two integers whose product is 24?

The mean of 10 observations is 17. One more observation is included and the new mean becomes 16. The 11th observation is