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Random Puzzles 


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Puzzle 1 


Using a 3 gallon container and a 7 gallon container (along with a water source and drain) …

… can you measure exactly 5 gallons in the fewest steps?

Puzzle Copyright © Kevin Stone

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Puzzle 2 


Using the letters AAAAEERRRRTT complete this grid. The grid reads the same across as down.

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

Puzzle Copyright © Kevin Stone

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??

Puzzle 3 


My local greengrocer is a would-be mathematician.

She likes to arrange the apples in nice rows.

When she lays the apples in rows of 3, she has one left over.

And, when she lays them in rows of 5, she also has one left over.

Remarkably, she also has one left over when she arranges them in rows of 7 and 9.

But 11 seems to be the magic number, because in rows of 11 there are no apples left over.

How many apples does she have?

Puzzle Copyright © Kevin Stone

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??

Puzzle 4 


Starting with SOFT, change one letter at a time until you have the word LENS.

Each change leaves the other letters in their original places and must result in a proper word.

What is the minimum number of steps required to achieve this change?
SOFT
....
....
....
LENS

Puzzle Copyright © Kevin Stone

workings hint answer print