Quantitative Aptitude - Arithmetic Ability Questions

If 4x - 5y = -37 and 7x + y = -16, then x - y = ______

Six years ago, the ratio of the two persons P and Q was 3 : 2. Four years hence the ratio of their ages will be 8 : 7. What is P's age?

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)

The sum of three numbers is 252. If the first number is thrice the second and third number is two-third of the first, then the second number is

Product of digits of a 2­digit number is 12. If we add 36 to the number, the new number obtained is a number formed by interchange of the digits. What is the number.

In the following question, select the odd number from the given alternatives.

Select the odd number from the given alternatives.

What is the value of cos2A/(1 + sinA)?