Quantitative Aptitude - Arithmetic Ability Questions

A and B together do a job in 15 days and A alone could do the same job in 20 days. How many days would B take to do half the job if he worked alone?

Ram's father is twice as old as Ram is. Eight years ago the age of Ram's father was 2.5 times his age. What is Ram's current age?

If x3 – 4x2 + 19 = 6(x – 1), then what is the value of [x2 + (1/x – 4)]?

The ratio of three numbers is 2 : 5 : 7. If their product is 1890, then what is the sum of the three numbers?

The curved surface area and the slant height of a right circular cone are 99 sq.cm and 9 cm respectively. Find its diameter (in cm)

If 2x + 3y = 0 and 3x ­- 4y = 34, then x ­- y = ______

If P = 99, then the value of P(P2+ 3P + 3) is

Select the odd word/letters/number/number pair from the given alternatives.