Quantitative Aptitude - Arithmetic Ability Questions

In ΔABC measure of angle B is 900. If cotA = 8/15, and AB = 0.8cm, then what is the length (in cm) of side BC?

The average of five consecutive even numbers is 40. What is the value of smallest of these numbers?

A train travelling at the speed of 66 kmph crosses a 300 m long platform in 24 seconds. How long was the train?

Amit can complete a work in 25 days and Punit can complete the same work in 20 days. Punit alone worked at it for 10 days and then left the work. In how many days will Amit alone complete the remaining work?

From the four corners of a rectangular sheet of dimensions 25 cm x 20 cm, square of side 2 cm is cut off from four corners and a box is made. The volume of the box is

If 2x + 3y – 5z = 18, 3x + 2y + z = 29 and x + y + 3z = 17, then what is the value of xy + yz + zx?

If l + m + n = 9 and l2+m2+n2 = 31, then the value of lm + mn + nl will be

∆PQR is right angled at Q. If cosecP = 17/15, then what is the value of sinR ?