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Difficulty: EasyPuzzle 321

I have a machine which has four sequential cog wheels in constant mesh.

The largest cog has 81 teeth and the others have 52, 36 and 20 respectively.

What is the fewest number of revolutions the largest cog must make so that all of the cogs are back in their starting position?

?

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[Ref: ZAVS] © Kevin Stone 



Difficulty: EasyPuzzle 322

What is represented by this BrainBat?

STEPPETSPETS

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[Ref: ZNKQ] Copyrighted. 



Difficulty: EasyPuzzle 323

What three-letter word best completes the below words?

C...ON
HE...
E...H
M...YR
QU...ER
ST...

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[Ref: ZOHI] © Kevin Stone 



Difficulty: MediumPuzzle 324

Each of the 6-letter words below can be broken down into two common 3-letter words.

NOTIFY = FIN + TOYFor example: NOTIFY = FIN TOY.

HELIUM
LATEST
ALMOND
ELDEST
SAFETY
RADIUM
DESERT
WEALTH
TRICKY
FUNNEL

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[Ref: ZRJA] © Kevin Stone 


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[Added September 1997]

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