Quantitative Aptitude - Arithmetic Ability Questions

A Lawn roller makes 20 revolutions in one hour. The radius it runs through 25 minutes is

AB is a chord of the circle and its center is “O”. ON is perpendicular to AB. If the length of AB=20 cm, ON-(2√11) cm, find the radius (in cm) of the circle.

A student, by mistake, wrote 64 in place of 46 as a number at the time of finding the average of 10 given numbers & got the average as 50. The correct average of the numbers is

What is the value 32cos 39sin 51-sin239 + sin251

Select the odd word/letters/number/number pair from the given alternatives.

Select the odd number from the given alternatives.

A = (x8 – 1)/(x4 + 1) and B = (y4 – 1)/(y2 + 1). If x = 2 and y = 9, then what is the value ofA2 + 2AB + AB2?

Sumit and Amit undertook a work for Rs 7200. Sumit alone can do the work in 5 days and Amit alone can do the work in 4 days. If they work together,then what will be the difference (in Rs.) in the amount they receive?