Quantitative Aptitude - Arithmetic Ability Questions

By what fraction selling price (S.P.) must be multiplied to get the cost price (C.P.) if the loss is 20% ?

A superfast Duronto express running at 90 kmph overtakes a bike running at 36 kmph in 25 seconds. What is the length of the train in meters?

A can do 1/3rd of a job in 3 days and B can do half of the job in 9 days. If they work on it together, then in how many days can they finish half of the job?

S, T and U started a business by investing Rs 4200, Rs 6300 and Rs 8400 respectively. S left the business after 3 months, T left 6 months after the business had started and U remained in the business till one year. At the end of one year the total profit is Rs 6000. What is the U’s share (in Rs) in the profit?

If (x + y):(x - y) = 11:1, find value of (5x + 3y)/(x - 2y).

If x+19x=4, then 9x2+19x2 is

If a + b = 4 and ab = 3, then what is the value of a3 + b3?

If ab+ba=1,then the value of a3+b3 is