Quantitative Aptitude - Arithmetic Ability Questions

If A, B and C can do a job working alone in 12, 18 and 36 days respectively. They all work together for 2 day, then B quits. How many days will A and C take to finish rest of the job?

Simple interest on a sum for six months at 5% per annum is Rs 65.5.What is the value (in Rs) of sum ?

The ten's digit of a 2-digit number is greater than the units digit by 7. If we subtract 63 from the number, the new number obtained is a number formed by interchange of the digits. Find the number.

In a class, average height of all students is 'a' cms. Among them, average height of 10 students is 'b' cms and the average height of the remaining students is 'c' cms. Find the number of students in the class. (Here a>c and b>c )

10% discount is offered on an item. By applying a promo code the customer wins 20% cash back. What is the effective discount?

∆XYZ is right angled at Y. If tanX = 24/7, then what is the value of cotZ ?

For x = 462+3, what is the value of x+22x-22+x+23x-23

What is the length of the side of an equilateral triangle, if its area is 64√3 sq cm?