Find out the value of a when $$x^3+ax^2+ 2x+3 $$ is divisible by (x+1)?

If one root of the equation Ax²+Bx+C = 0 is two and a half times the others, then which of the following is TRUE? 

Which of the following represents a correct proportion?

Two boats are traveling with speeds of 36 km/hr and 54 km/hr respectively towards each other. What is the distance (in meters) between the two boats one second before they collide?

A man sells two chairs at Rs. 120 each and by doing so he gains 25% on one chair and loses 25% on the other. His loss on the whole in Rs.is

A number when divided by the sum of 555 and 445 gives two times their difference as quotient and 30 as the remainder. The number is: 

Direction: Percentage of different types of employees in a company in two consecutive years.

What was the approximate difference in the number of B type of employees during 1997 and 1998? 

$$ {5^{1\over 4}×(125)^{0.25}}$$ is equal to