Question Details

A number arrangement machine when given an input line of numbers rearranges them following a particular rule in each step. The following is an illustration of input and rearrangement:

Input: 84629     57426     76932     27483     49853     62434
Step I: 273     84629     57426     76932     49853     62434
Step II: 53     273     84629     57426     76932     62434
Step III: 572     53     273     84629     76932     62434
Step IV: 23     572     53     273     84629     76932
Step V: 732     23     572     53     273     84629
Step VI: 2     732     23     572     53     273

Step VI is the last step of the given arrangement. Based on the given logic, rearrange the given input.
Input: 63825     49857     38679     72548     45328     95763

How many steps are required to complete the rearrangement for the given input?

Options

A

Eight

B

Seven

C

Four

D

Five

E

Six

Show Answer

Correct Answer :

Option E

Six

Solution :

The correct option is Six.

Let us analyze the logic behind the number arrangement machine step by step based on the given illustration.

In each step, one number from the input is selected, transformed according to a specific rule, and placed at the extreme left (front) of the arrangement.

Pattern analysis from the illustration:
Let us examine which number is moved and transformed in each step:
1. Step I: The number 27483 becomes 273. Notice: The even digits are removed (4, 8 are removed leaving 2, 7, 3).
2. Step II: The number 49853 becomes 53. Notice: The even digits are removed (4, 8 are removed, leaving 9, 5, 3? Wait, odd digits are 9, 5, 3 -> wait, 9 is removed? Let's check 49853 -> 53. Odd digits are 9, 5, 3. Even digits are 4, 8. Wait, why 53? Let's look closer at 49853: 4,9,8,5,3 -> odd digits 9, 5, 3. Wait, prime digits? Or sum/difference? Let's check: 4,9,8,5,3 -> non-prime digits are 4, 9, 8? 5 and 3 are prime. 2,7,3 in 27483: 2, 7, 3 are prime digits (2, 7, 3), 4 and 8 are not prime. So prime digits are kept!).
Let's verify prime digits rule (Prime digits: 2, 3, 5, 7):
- 27483 -> Prime digits: 2, 7, 3. Non-prime digits (4, 8) removed. Result: 273.
- 49853 -> Prime digits: 5, 3. Non-prime digits (4, 9, 8) removed. Result: 53.
- 57426 -> Prime digits: 5, 7, 2. Non-prime digits (4, 6) removed. Result: 572.
- 49853 was already processed. Next: 62434 -> Prime digits: 2, 3. Non-prime digits (6, 4, 4) removed. Result: 23.
- 76932 -> Prime digits: 7, 3, 2. Non-prime digits (6, 9) removed. Result: 732.
- 84629 -> Prime digits: 2. Non-prime digits (8, 4, 6, 9) removed. Result: 2.

Selection Order:
In each step, the number with the smallest transformed value (or based on smallest first digit / order) is moved to the front.
Since there are 6 numbers in the given input, each step transforms and places one number at the front.
Total numbers in input = 6.
Therefore, exactly 6 steps are required to process all 6 numbers in the arrangement.

Let's trace the given input:
Input: 63825, 49857, 38679, 72548, 45328, 95763
Number of elements = 6.
- Step I: Processes 1st element
- Step II: Processes 2nd element
- Step III: Processes 3rd element
- Step IV: Processes 4th element
- Step V: Processes 5th element
- Step VI: Processes 6th element

Thus, total Six steps are required to complete the rearrangement.

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