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Mathematical Puzzles


Difficulty: MediumPuzzle 21

Puzzle IconAt a recent visit to the reptile house at the local zoo, I counted a total of 27 heads and 70 feet.

I was counting snakes, lizards and people and I know that there were exactly twice as many lizards as people.

How many snakes did I count?

[Ref: ZLHO] © Kevin Stone

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Difficulty: MediumPuzzle 22

Puzzle IconSomeone drove from Aardvark to Beeville.

On the first day they travelled 1/3 of the distance.

On day two they travelled 1/2 of the remaining distance.

On day three they travelled 2/3 of the remaining distance.

On day four, after covering 3/4 of the remaining distance, they were still 5 miles away from Beeville.

How many miles had they covered so far?

[Ref: ZNKP] © Kevin Stone

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Difficulty: EasyPuzzle 23

Puzzle IconCan you Find a number...

...whose double exceeds its quarter by 7.

[Ref: ZHRW] © Kevin Stone

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Difficulty: EasyPuzzle 24

Puzzle IconLast week, I travelled from Birmingham to Glasgow (via bicycle).

On the first day I travelled one quarter of the distance.

On day two, I travelled one half of the remaining distance.

On day three, I travelled three quarters of the remaining distance.

Yesterday I travelled one third of the remaining distance.

I now have 21 miles left to travel.

How far is it from Birmingham to Glasgow in total?

[Ref: ZZVA] © Kevin Stone

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