Quantitative Aptitude - Arithmetic Ability Questions

In a school 60% of the students are girls. If number of boys is 480, then what is the total number of students in the school?

The simplified form of (4x + 3)2 . (3x - 5) - (4x3 - 12x2 + 9x - 20) is

The ratio of present ages of Sheetal and Divya is 6 : 5. After 8 years, their ages will be in the ratio of 22 : 19. What is the present age (in years) of Divya?

Of the 5 numbers whose average is 78, the first is 2/11 times the sum of other 4. The first number is

A does 1/2 as much work as B and C does1/2as much work as A and B together. If C alone can finish the work in 40 days, then together all will finish the work in

A book seller allowed 10% discount on printed price. He gets 30% commission from publisher. His profit in percent will be

If (5x – y)/(5x + y) = 3/7, then what is the value of (4x2 + y2 – 4xy)/(9x2 + 16y2 + 24xy) ?

If cosθ1-sinθ+cosθ1+sinθ = 4, then the value of θ (0°<θ<90°)?