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Three people check into a hotel. They pay $30 to the manager and go to their room. The manager finds out that the room rate is $25 and gives the bellboy $5 to return to the guests. On the way to the room the bellboy reasons that $5 would be difficult to split among three people so he pockets $2 and gives $1 to each person. Now each person paid $10 and got back $1. So they paid $9 each, totaling $27. The bellboy has another $2, adding up to $29.
Where is the remaining dollar?
That's a fun one. I solve it with a pie chart to help me keep track of where all the dollars are.
Reminds me of quick change artists confusing clerks at fast food joints.
I think 96.
8 X 11= 88 + 8
Examples 2+5 and 3+6 suggest that the 2nd number is multiplied by the first number, then added to the first number
I win, I showed my work
This kind of pattern solving is interesting as it tells us a lot about how our brains work.
The puzzle is displayed as linear mathematical problems. Working them as they are laid out, horizontally, looking for the "trick", will lead you to the 96 answer. Looking at the entire puzzle as a whole and viewing it from the perspective that it's a grid and not just horizontal problems will lead you to the 40 answer.
I think that's the actual cool part. Not that there are two different answers but how our brains lead us to find the two different answers.