Quantitative Aptitude - Arithmetic Ability Questions

Mohan starts to calculate sum of all odd natural number less than 83. What result does he get?

The external and the internal radii of a hollow right circular cylinder of height 15 cm are 6.75 cm and 5.25 cm respectively. If it is melted to form a solid cylinder of height half of the orignal cylinder, then the radius of the solid cylinder is

At least two pairs of consecutive angles are congruent in a _____.

What is the value of 643 × 121289 - 169 ?

If the amount received at 10% per annum Compound interest after 3 yrs is Rs 19965, then what will have been the principal (in Rs) amount?

If 2x -­ 3 ≤ 5 + x and 5 -­ x < 1 + 5x; then x can take which of the following values?

The point of intersection of all the angle bisector of a triangle is ______ of the triangle.

If cos(A-B) - cos(A+B) = x, then the value of x is