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Puzzle 481
What comes next in this sequence:
hydrogen helium lithium beryllium boron ?
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Puzzle 482
Start in the bottom left corner and move either up or right, one square at a time, using the numbers and the mathematical signs along the way. What is the largest total you can make?
| + | 2 | – | 4 | + | 2 |
| 2 | + | 2 | – | 2 | + |
| – | 1 | + | 3 | – | 3 |
| 2 | – | 3 | + | 1 | – |
| + | 1 | – | 3 | + | 2 |
| 3 | + | 3 | – | 2 | + |
Note: this puzzle is not interactive, and the numbers cannot be clicked.
Puzzle Copyright © Kevin Stone
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Puzzle 483
Which letter comes next in this sequence:
Y P I D ?
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Puzzle 484
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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