Input: 72 45 18 63 27
Rule: In each step, the smallest number is multiplied by 2 and placed at the end.
Step 1: 45 63 72 27 36
What is Step 2?

Question

Accepted Answer

(D) 45 63 72 36 54. Explanation: Step 1 result: 45 63 72 27→27×2=54 goes to end, and 36 was already there. Re-trace: smallest of {72,45,18,63,27} is 18→18×2=36. Remove 18, append 36: 72 45 63 27 36. Step 2: smallest of {72,45,63,27,36} is 27→27×2=54: 72 45 63 36 54. Answer closest is D.