Quantitative Aptitude - Arithmetic Ability Questions

What is the simplified value of (1– sin A cos A)(sin A + cos A)?

What is the value of 1+aa1/2+a-1/2-a1/2+a-1/21+a+a-1/2 ?

If x + (1/x) = 2, then what is the value of x21 + (1/x1331)?

Calculate the value of 0.77777 + 0.7777 + 0.777 + 0.77 + 0.7 + 0.07.

In two types of brass, the ratios of Copper to Zinc are 8:3 and 15:7 respectively. If the two types of brass be melted and mixed in the ratio 5:2 a new type of brass is obtained. The ratio of Copper to Zinc in this new type of brass is

What least number must be subtracted from 210, so that the sum is completely divisible by 11?

The length of a median of an equilateral triangle is 12√3 cms. Then the area of the triangle is

The length of the diagonal of a square is 14 cm. What is area of this square?