Quantitative Aptitude - Arithmetic Ability Questions

The area of a semicircle is 1925 sq.cm. Calculate its perimeter (in cm).

The sum of digits of a two-digit number is 9. When the digits are reversed, the number decreases by 45. Find the changed number.

The length of the base of an isosceles triangle is 2x­2y+4z, and its perimeter is 4x­2y+6z. Then the length of each of the equal sides is

A box of 20 items was bought for Rs. 6,400 after a discount of 20%. Find the cost of each item.

The diagonals of two squares are in the ratio 5:2.The ratio of their area is

ΔPQR is right angled at Q. If m∠R = 45°, then find the value of (tanP - 1/2).

If 5x - ­5(3x ­- 2) < 4x -­ 1 < 2 + 2x, then x can take which of the following values?

Find the value of 27a3 + 1a3, if 9a2 + 1a2 = 43