Quantitative Aptitude - Arithmetic Ability Questions

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 work can be completed by 18 boys in 24 days. If 6 boys leave after working for 12 days, then how many days will be needed to complete the remaining work?

If a young son works quickly for 2 hours and prepares 16 items in a day, and his old father works slowly for 8 hours and prepares 24 items in a day, which of the following is true?

Find the range of the data : 11,13, 9, 17, 13, 19, 10, 11

If x2+1x2-6, then find the value of 2x(x-1)x3-x2-x+1

4*(-­0.1(5.5 + 8.5)) of 0.5 = ?

Product of digits of a 2­digit number is 12. If we add 36 to the number, the new number obtained is a number formed by interchange of the digits. What is the number.

The sum of all prime numbers between 18 and 32 is: