Quantitative Aptitude - Arithmetic Ability Questions

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

The value of cos (1110°) is

If x=aCosθCosΦ, y = aCosθSinΦ and z= aSinθ, then the value of x2+ y2 + z2 is

The ratio of two positive numbers is 3:4. The sum of their squares is 400. What is the sum of the numbers?

If a retailer offers a discount of 28% on the marked price of his goods and thus ends up selling at cost price, what was the % mark up?

To cover a distance of 144 km in 3.2 hours what should be the average speed of the car in meters/second?

A, B and C can do a job working alone in 6, 9 and 18 days respectively. They all work together for 1 day, then A and B quit. How many days C working alone will take to complete the remainder of the job?

Ramesh and Rahman can do a work in 20 and 25 days respectively. After doing collectively 10 days of work, they leave the work due to illness and Suresh completes rest of the work in 3 days. How many days Suresh alone can take to complete the whole work ?