Quantitative Aptitude - Arithmetic Ability Questions

The mean score in a test of the 10 boys in a class was 15 while the overall mean of the 25 students in the class was 16.2. What was the mean score of the girls?

Find the missing digit if it has 11 and 13 as factors?

A and B undertake a piece of work for Rs. 250 . A alone can do that work in 5 days and B alone can do that work in 15 days . With the help of C, they finish the work in 3 days . If every one gets paid in proportion to work done by them, the amount C will get is 

G is the centroid of the equilateral triangle ABC, if AB = 9cm then AG is equal to

Find out the odd word/letters/number/number pair from the given alternatives.

sin(A+B) -­ sin(A-­B) is equal to

Select the odd letters from the given alternatives.

What is the value of (4a2 + 8b + 14c + 2)/2 ?