MBA Exam

A group of workers can complete a certain job in 9 days. But every alternate day starting from the second day, 2 workers are withdrawn from the job and every alternate day starting from the third day one worker is added to the group. When the job is finished, there is no worker left but it takes twice the time compared to the originally estimated time. What is the original number of workers.....??

1) 8
2) 10
3) 18
4) CBD

Read Solution (Total 1)

Let the number of workers be X.
Then, the total work = 9X man days.
As per the given condition, number of workers starting with the first day will be X, X - 2, X - 1, X - 3, X - 2, X - 4, X - 3… and so on till 18 days. So separating the odd and even terms and adding (9X - 36) + (9X - 54) = 9X
=> X = 10
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MBA Other Question

Based on the following information answer the following questions.The pages of a book are numbered 0, 1, 2,â€¦. and M, M > 0. There are four categories of instructions that direct a person in positioning the book at a page. The instruction types and their meanings are : 1. OPEN : position the book at page number 12. CLOSE : position the book at page number 03. FORWARD, n : from the current page move forward by n pages; if, in this process, page number M is reached, stop at M.4. BACKWARD, n : from the current page, move backward by n pages; if in this process, page number 0 is reached, stop at page number 0.In each of the following questions, you will find a sequence of instructions formed from the above categories. In each case, let n1 be the page number before the instructions are executed and n2 be the page number at which the book is positioned after the instructions are executed.Which of the following statements is true?

1) n<sub>1</sub> = n<sub>2</sub> if M = 10 and n<sub>1</sub> = 0
2) M = 20 provided n<sub>1</sub> > 0
3) n<sub>1</sub> > 30 provided M = 90
4) n<sub>1</sub> = 37 provided M =25
There is a tank of capacity 165 litres. it has N taps numbered from 1-N. At the start of the t^th minute where 1<_t<_N the tap numbered t which fills the tank at t litres/min is opened. If it takes exactly N min to fill the tank then find N?

1) 8
2) 9
3) 7
4) 10