Infosys Puzzles

1.There is a escalator and 2 persons move down it.A takes 50 steps and B takes 75 steps while the escalator is moving down. Given that the time taken by A to take 1 step is equal to time taken by B to take 3 steps. Find the no. of steps in the escalator while it is stationary.
100 Steps 110 Steps 120 Steps 130 Steps

2.If 5/2 artists make 5/2 paintings using 5/2 canvases in 5/2 days then how many artists r required to make 25 paintings using 25 canvases in 25 days?
25 26 27 24

3.If the digits of my present age are reversed then i get the age of my son.If 1 year ago my age was twice as that of my son.Find my present age.
Father - 72, Son - 38 Father - 71, Son - 39 Father - 73, Son - 37 Father - 73, Son - 38

4.There are 6561 balls out of them 1 is heavy. Find the minimum number of times the balls have to be weighed for finding out the heavy ball.
7 8 9 10

5.If I walk with 30 miles/hr I reach 1 hour before and if I walk with 20 miles/hr I reach 1 hour late. Find the distance between 2 points and the exact time of reaching destination is 11 am then find the speed with which it walks.
120miles and 24 miles/hr 121miles and 24 miles/hr 122 miles and 24 miles/hr 123 miles and 24 miles/hr