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Difficulty: MediumPuzzle 281

ClockYou have the misfortune to own an unreliable clock.

This one gains exactly 15 minutes every hour.

It is now showing 3.00am and you know that is was correct at midnight, when you set it.

The clock stopped four hours ago, what is the correct time now?

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[Ref: ZSIE] © Kevin Stone 



Difficulty: EasyPuzzle 282

Old CarI started a journey to my Aunt's yesterday with a full tank of gasoline, 10 gallons, but at that exact moment my gasoline tank sprang a leak.

I managed to drive 50 miles, exactly one hour, before coming to a complete stop with an empty tank.

I know that the car manages 25 miles per gallon.

How quickly was I losing gasoline?

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[Ref: ZRNJ] © Kevin Stone 



Difficulty: MediumPuzzle 283

What is the sum of all of the numbers from 1 to 1000?

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[Ref: ZONR]  



Difficulty: EasyPuzzle 284

What is represented by this BrainBat?

                SCHEME
             SCHEME SCHEME
          SCHEME SCHEME SCHEME
      SCHEME SCHEME SCHEME SCHEME
   SCHEME SCHEME SCHEME SCHEME SCHEME
SCHEME SCHEME SCHEME SCHEME SCHEME SCHEME

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[Ref: ZSFS]  


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[Added September 1997]

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