Discussion of Question with ID = 008 under Passwords-and-Inputs

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Question

"gate dark laid 23 83 34 sand 44" is re-arranged according to a particular rule, in the steps mentioned below.

  1. gate 44 dark laid 23 83 34 sand
  2. gate sand 44 dark laid 23 83 34
  3. gate 34 sand 44 dark laid 23 83
  4. gate 83 34 sand 44 dark laid 23
  5. gate 23 83 34 sand 44 dark laid
  6. gate laid 23 83 34 sand 44 dark
  7. gate dark laid 23 83 34 sand 44
  8. gate 44 dark laid 23 83 34 sand

Which of the following steps would read as "28 41 rank idle kilo 27 23 king" if the input is "28 27 23 king 41 rank idle kilo", and the re-arrangement is done according to the above rule?

A

4

B

5

C

2

D

3

Soln.
Ans: a

In each step, the last item goes to position 1. These are the steps for re-arrangement starting with 28 27 23 king 41 rank idle kilo:

  1. 28 kilo 27 23 king 41 rank idle
  2. 28 idle kilo 27 23 king 41 rank
  3. 28 rank idle kilo 27 23 king 41
  4. 28 41 rank idle kilo 27 23 king
  5. 28 king 41 rank idle kilo 27 23
  6. 28 23 king 41 rank idle kilo 27
  7. 28 27 23 king 41 rank idle kilo
  8. 28 kilo 27 23 king 41 rank idle

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