Quantitative Aptitude - Arithmetic Ability Questions

If an equilateral triangle has side 12 cm, then what is the difference (in cm) between the circumradius and inradius?

The mean of marks secured by 45 students in division A of class X is 56, 40 students of division B is 52 and that of 40 students of division C is 50. Find the mean of marks of the students of three divisions of Class X.

Yaman sold an item at a loss of 10%. If he had sold it for Rs.57 more, he would have made a profit of 20%. What should be the selling price of the item to make a profit of 30%?

Calculate the simple interest if Rs. 1800 is invested for 10 years at a rate of 5% per annum.

129 meter from the foot of a cliff on level of ground, the angle of elevation of the top of a cliff is 30°. The height of this cliff is

If "basis points" are defined so that 1 percent is equal to 100 basis points, then by how many basis points is 82.5 percent greater than 62.5 percent?

What is the equation of the line which intercepts x­axis and y­axis at 3/4 and ­2/3 respectively?

What is the least number that when divided by 63 and 105 leaves remainder 4 in each case?