Quantitative Aptitude - Arithmetic Ability Questions

What is the value of (3/5 + 7/9)?

What is the value of ( 1/2 - cot45) ?

The sum of 2xy(3x + 4y - 5z) and 5yz(2x - 3y) is

If x + y = 3, then what is the value of x3 + y3 + 9xy?

If x – 4y = 0 and x + 2y = 24, then what is the value of (2x + 3y)/(2x – 3y)?

Two men are on opposite sides of a tower. They measure the angles of elevation of the top of the tower as 30 ̊ and 45 ̊ respectively. If the height of the tower is 50 m, the distance between the two men is (Take √3 = 1.73)

Find the odd word/letters/number from the given alternatives.

Which of the following numbers is a perfect square?