- AFour
- BTwo
- CThree
- DOne
Step-by-Step Solution
Step I: 1 3 7 2 5 9. Step II places the next smallest (2) after 1 and the next largest (7) before 9, giving 1 2 3 5 7 9, which is fully ascending. Two steps are required.
Answer: B) Two
A number-arranging machine rearranges a line of numbers step by step. In each step it moves the smallest of the not-yet-arranged numbers to the extreme left and the largest of the not-yet-arranged numbers to the extreme right, while the remaining numbers keep their relative order. Input line: 3 7 2 9 5 1. How many steps are needed to arrange the whole line into ascending order?
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