Puzzle 1
Take a normal piece of paper, exactly 0.1 mm thick.
Fold it in half, and then in half again, and again, and again.
Do this a total of 50 times.
How thick would the final paper be (if this could be done)?
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Puzzle 2
Hidden in the grid below are six hidden animals.
The letters are in sequence, but you move from letter to letter using the moves of a chess knight.
Once you have crossed off all of the animals, you will be left with seven unused letters.
What animal do these letters spell?

The moves of a knight are:

Note: this puzzle is not interactive, and the letters cannot be clicked.
Puzzle Copyright © Kevin Stone
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Puzzle 3
Below are safari animals, however, each letter has been replaced by its position in the alphabet, but the spaces between the resulting numbers have been removed.
For example, DOG = 4-15-7 = 4157.
What are the safari animals?
18891415
3181531549125
79181665
38552018
12515161184
89161615
512516811420
2216611215
1291514
Puzzle Copyright © Kevin Stone
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Puzzle 4
What well-known saying has been altered below:
lla doog shingt eomc ot ehost ohw taiw
Puzzle Copyright © Kevin Stone
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