Puzzle 1
HWAYETRDETIPZLHV
OMNLTESOSHSUZEAE
Puzzle Copyright © Kevin Stone
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Hint
The question is written in English, but not in its usual order.
Answer
32.
Reading one letter from the top row and then one from the bottom row, the puzzle reads: 'How many letters does this puzzle have'.
Puzzle 2
Sam takes 20 days to build a wall.
Taylor and Kelly each take 10 days to build a wall.
How long will it take the three of them to build a wall if they work together?
Puzzle Copyright © Kevin Stone
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Hint
How many walls can be built in 20 days?
Answer
4 days.
Reasoning
In 20 days, Sam can build 1 wall, and Taylor and Kelly can each build 2 walls.
So, in 20 days, 5 walls can be built.
Therefore, one wall will take 4 days to build.
Puzzle 3
What number comes next in this sequence:
3 · 24 · 102 · 312 · 777 · ?
Puzzle Copyright © Kevin Stone
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Answer
1680.
This is n to the power of 5, starting with 2^5 = 32, with the last digit missing, 7^5 = 16807.