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## #1. Do some maths.

Give the bags numbers from 0-99, then take 0 coins from the bag number 0, 1 coin from the bag number 1, 2 coins from the bag number 2, and so on until we take 99 coins from the bag number 99. Gather all the coins we have taken together and put them on the scale. Then subtract 5050 (the weight of 1+2+3…etc.) from the total weight. If you have .01 left, then the first bag has the gold. If you get .66 left, then the 66th bag has the gold.

## #2. Light both ends of rope A and one end of rope B.

After 30 minutes, rope A will be completely burned up and there will be thirty minutes of rope B left. Light the other end of rope B; it will burn up in 15 minutes. Total time elapsed since starting the ropes on fire: 45 minutes.

## #3. Tilt the glass.

Carefully tilt the cylindrical glass until the surface of water just touches the upper brim of the glass. Make sure no water spills out of it. Now check whether the surface of water also touches the brim of the bottom surface of the glass. If it does, then the glass is exactly half full. If the surface of water is just above the bottom brim, then the glass is more than half empty and otherwise it is less than half empty.

## #4. Push the cork into the bottle.

You’ll be able to shake out the coin.

## #5. An infinite number.

The obvious answer is the North Pole, but actually there are an infinite number of answers because near the poles, directions get pretty fuzzy. Check out a much more detailed answer HERE.

h/t: Buzzfeed

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