Quantitative Aptitude - Arithmetic Ability Questions

There are total 200 students in a school, of which 1/5th are boys. Find the number of girls in the school.

A's income is 25% more than B's income. B's income is what percent of A's income?

In a circle, two arcs of unequal length subtend angles in the ratio 5:3. If the smaller angle is 45° then the measure of other angle in degrees.

If √(1 + cot2A)/cotA = x, then the value of x is

If the number 583_437 is completely divisible by 9, then the smallest whole number in the place of the blank digit will be

The diameter of a circle is 28 cm find its area?

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 1:4 and area of ΔADE is 6 sq cm, what is the ratio of area of ΔADE: area of quadrilateral BDEC?

The ratio between the area of a square and that of a circle, when the length of a side of the square is equal to that of the diameter of the circle, is (take π=22/7)