Quantitative Aptitude - Arithmetic Ability Questions

A mobile plan costs Rs. 32 for 6 minutes. What is the approximate cost, in rupees, for 4 minutes?

A sum of Rs. 3000 amounts to Rs. 6000 in two years at compound interest. The interest for four years is

Two buses are moving towards each other with speed of 20 km/hr and 34 km/hr respectively. What will be the distance (in metres) between the two buses one second before they collide?

If the sum of ten different positive integers is 100, then what is the greatest possible number among these 10 numbers?

In a mixture of 25 litres, the ratio of milk to water is 4:1. Another 3 litres of water is added to the mixture. The ratio of milk to water in the new mixture is

The difference between compound interest and simple interest on Rs. 5000 for 2 years at 8% per annum payable yearly is

Find the simple interest on Rs. 50 for 6 months at the rate of 10 paise per rupee per month.

If α and β are roots of the equation 3x2 – 13x + 14 = 0, then what is the value of (α/β) + (β/α)?