Quantitative Aptitude - Arithmetic Ability Questions

What is the altitude of an equilateral triangle whose side is 12 cm?

The value of cos220° + cos270°is

If X+Y=3,XY=2, find the value of X3-Y3

Point A divides segment BC in the ratio 5:1. Co-ordinates of B are (6 ,-4) and C are (0,8). What are the co-ordinates of point A?

Munni can bake 70 cakes in 7 hours, Munni and Guddi together can bake 90 cakes in 6 hours. How many cakes Guddi can bake in 10 hours?

Jaikishen can do a piece of work in 15 hours. If he is joined by Jhanvi who is 50% more efficient, in what time will they together finish the work?

If a -­ b = 3 and ab =28, then a3 - b3 is

Product of digits of a 2-digit number is 72. If we add 9 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.