Quantitative Aptitude - Arithmetic Ability Questions

What is the area (in sq cm) of an equilateral triangle of side 6 cm?

In a circle with centre O, AB is a diameter and CD is a chord which is equal to the radius OC. AC and BD are extended in such a way that they intersect each other at a point P, exterior to the circle. The measure of ∠APB is

If cos 240° = x, then value of x is

The value of x for which the expressions 15x + 4 and 13x - 2 become equal is ______

If a2+1a2 = 38, then find the value of a-1a?

One diagonal of a rhombus is half the other. If the length of the side of the rhombus is 20 cm, what is the area of the rhombus?

Product of digits of a 2-digit number is 24. If we add 45 to the number, the new number obtained is a number formed by interchange of the digits.What is the original number?

A can do a work in 16 days and B in 20 days. If they work on it together for 8 days, then what fraction of work is left?