Quantitative Aptitude - Arithmetic Ability Questions

What is the simplified value of 12-13 ?

If x -­ y = ­7 and x + y = 13, then x2 - y2 is

Coefficient of x2 in 4x3 - 2x2 + 2x -­ 3 are

tan3A is equal to

A 1.6 m tall observer is 45 meters away from a tower. The angle of elevation from his eye to the top of the tower is 30°, then the height of the tower in meters is

The difference between cost price and selling price is Rs 221. If profit percentage is 17%, then what is the selling price (in Rs)?

B is thrice as efficient as A and C is 0.75 times as efficient as A. What is the ratio of number of days taken by A, B and C when they work individually?

The value of cos220° + cos270°is