Quantitative Aptitude - Arithmetic Ability Questions

If selling price is Rs. 72 and Gain percentage = 20%, calculate the Cost Price.

The sum of present age of father and his son is 60 yrs. Six years ago, father's age was five times the age of the son. After 6 years, son's age will be?

If a+1a2 = 3, then the value of a18+ a12+a6 + 1 is

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

From a point on a bridge across the river, the angles of depression of the banks on opposite sides of the river are 30° and 45° respectively. If the bridge is at a height of 2.5m from the banks, then the width of the river is (take √3 = 1.732)

In simple interest rate per annum a certain sum amounts to Rs. 5,182 in 2 years and Rs. 5,832 in 3 years. The principal in rupees is

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

Select the odd letters from the given alternatives.