Quantitative Aptitude - Arithmetic Ability Questions

A, B and C can do a job working alone in 6, 9 and 18 days respectively. They all work together for 1 day, then A and B quit. How many days C working alone will take to complete the remainder of the job?

Twenty one times of a positive number is less than its square by 100. The value of the positive number is

4 hrs after a goods train passed a station, another train travelling at a speed of 60 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 8 hours. What is the speed of the goods train?

If x = cosecθ - sinθ and y = secθ - cosθ, then the relation between x and y is

Coefficient of x2 in 6x3 + 4x2 + 2x + 3 is

What is the area (in sq cm) of a rhombus if the lengths of the diagonals are 12 cm and 14 cm?

ΔDEF is right angled at E. If secD = 25/7, then what is the value of cosecF ?

Find the Greatest Common Factor of 280 and 144.