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Puzzle 197 


Place letters into the grid such that every row, column, and 2 x 2 block has letters (in any order) that form a common word. Each letter is only used once, and no letter is repeated in the rows / cols / blocks.

Letters allowed: S C H O O L

Note: this puzzle is not interactive, and the squares cannot be clicked.

Puzzle Copyright © Alan Stillson and Frank Longo

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Puzzle 198 


All Matchstick Puzzles

Can you make this equation correct by moving exactly one matchstick?

4 + 5 = 6

Note: this puzzle is not interactive, and the matchsticks cannot be moved. The matchstick layouts for each digit are:

Default Digits

Puzzle Copyright © Kevin Stone

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Puzzle 199 


Using a tap, a nine gallon container and a four gallon container …

… can you measure exactly 6 gallons?

Puzzle Copyright © Kevin Stone

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Puzzle 200 


What number comes next in this sequence:

3 · 24 · 102 · 312 · 777 · ?

Puzzle Copyright © Kevin Stone

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