First, move the 3min person and the 1 min person over to the other side. Then move the 1min person back.Then move the 12 min and 8min people to the other side.Now move the 3min person to the right.And move both the 1min and 6min person to the left. Next, move the 1min person to the right and go back to the left together with the 3min person .While trying to solve the puzzle , the mathematical knowledge an skill that I applied is Data Analysis and Statistics Probability
I used the same method of Jia Wen
Same as jia wen and the methods i used to solve it is model and luck.
I was like trying to get the 1min person to carry the lamp back all the way, but soon saw that it was wasting the time. So, yeah, same as Jiawen.
First I move the 1min and 3min persons over. Then I move the 1min person back. After that, I made the 8min and 12min ladies move over. I proceed to move the 3min person back to the right. I then made the 6min and 1min men move to the left. Finally I moved the 1min person back to the right and together with the 3min person they moved back. I used trial and error.
Mine is same as Jia Wen.... tried others but found out they were a total waste of time
My method was the same as Jia Wen's
Same method as other classmates
Use no.1 to go across the bridge with no. 3.Then let no. 1 come back and go across the bridge with no.6.Then let no.1 come back again.Then use no.8 and no.12 go across the bridge.Then use no.3 to come back and together with no.1, go across the bridge.(1s to spare)Ps: Sorry, I looked at the main trick(not solution) as I was unable to solve the puzzle.While I was figuring out the solution(after I looked at the main trick),I applied addition and subtraction.
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Same method as everyone. I found out about this a little later... Ms Loh, there's a typo error at the title. It should be Bridge Crossing not Brdge Crossing.
mine was the same as everyone after 13 tries
Same method!!! Just that I took a long long time and many many tries before I got the answer.