Quantitative Aptitude - Arithmetic Ability Questions

The radii of two concentric circles are 68 cm and 22 cm. The area of the closed figure bounded by the boundaries of the circles is

What must be the length (in cm) of the diagonal of a rectangle if its area and breadth are 60 cm² and 5 cm respectively?

Find the value of 'a' for which x+3x+a24 is a perfect square.

If a + b + c + d = 4, then the value of 1(1-a)(1-b)(1-c) + 1(1-b)(1-c)(1-d) + 1(1-c)(1-d)(1-a) + 1(1-d)(1-a)(1-b)

What is the value of tan150°?

Which of the following triangle has the maximum area when inscribed inside the circle of same radius?

Find the odd word/letters/number from the given alternatives.

A, B and C can do a job working alone in 12, 16 and 24 days respectively. In how many days they can do the job if they worked together?