How do we get to door 12 in round 4?

#1

If the jailor is repeating third step over and over till round 100,then in round 3 the doors he will go to are 3,6,9,12,15…99 and then in round 4 the doors he will go to will be 2,5,8,11,14,17…98. I am really confused by this.

#2

Hey @Nitin-Bhattacharyya-2319140631658033 I’ll help you to understand in a better way . Suppose you got drunk and you opened all the doors . Now when you go in your second round you will only treat doors which are multiple of 2 i.e., (2,4,6,8…100) and now you go for third round which means you will only treat doors which are multiple of 3 i.e., (3,6,9,…99). Now when you go in your fourth round you will only treat doors which are multiple of 4 i.e., (4,8,12,16…100) and you have to go till 100 rounds. This will help you in understanding question better :smiley:

#3

Thanks,I thought the jailor repeated step 3 over and over

#4

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