Quantitative Aptitude - Arithmetic Ability Questions

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is

Ramesh uses a weight of 930 gm instead of 1 kg and sells sugar on its cost price. What will be his profit percentage on selling 15 kg sugar?

Karteek is twice as good a foreman as Raju and together they finish a piece of work in 20 days. In how many days will Raju alone finish the work?

What is the reflection of the point (-4, 3) in the line x = -2?

The area of a semicircle is 1925 sq.cm. Calculate its perimeter (in cm).

Among three numbers , second is twice the first and also thrice the third . If the average of the three numbers is 33 , then the largest number is

If x2-3x+1=0, then x+1x is (x≠0)

Instead of multiplying by 25, a student multiplies that number by 52 and gets 324 more than correct answer. Then that number is