MBA Exam

A sprinter started running on a circular path whose radius is r m. His speed (in m/sec) is (p/800)R, during the first 100 seconds, (p/1600)R, during the next 400 seconds, (p/3200)R during the next 1600 seconds and (p/6400)R during the next 6400 seconds and so on where R = (16/15)r. What is the ratio of the times taken by him for running the first and second rounds?

1) 16:63
2) 4:13
3) 85:256
4) 17:48

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MBA Other Question
How many four digit numbers are there which are divisible by 4 and have the sum of digits equal to the number of digits?

1) 4
2) 5
3) 6
4) 7
5) 8
 P, Q, R and S are 4 points in a circular region of radius 5*sqrt(3) such that the shortest of the 4 lines PR, PS, QR and QS is d .Is RS<15.I) d<16II) d>15 This question can be answered by

1) using one of I and II alone,but not by another
2) using either of I and II alone
3) using I and II together
4) can not be answered