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Random Puzzles


Difficulty: MediumPuzzle 1

Which of the following statements is true?

1. Exactly one of these statements is true.
2. Exactly two of these statements are true.
3. Exactly three of these statements are true.
4. Exactly four of these statements are true.
5. Exactly five of these statements are true.
6. Exactly six of these statements are true.

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[Ref: ZBIR]  


Difficulty: MediumPuzzle 2

What is the maximum overhang you can create with an infinite supply of bricks?

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[Ref: ZOKX]  


Difficulty: MediumPuzzle 3

What number comes next in this sequence:

15 20 20 6 6 19 19 5 14 ==?==

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[Ref: ZOSU] © Kevin Stone 


Difficulty: MediumPuzzle 4

Puzzle IconYou find yourself playing a game with your friend.

It is played with a deck of only 16 cards, divided into 4 suits:

   Red, Blue, Orange and Green.

There are four cards in each suit:

   Ace, King, Queen and Jack.

Ace outranks King, which outranks Queen, which outranks Jack - except for the Green Jack, which outranks every other card.

If two cards have the same face value, then Red outranks Blue, which outranks Orange, which outranks Green, again except for the Green Jack, which outranks everything.

Here's how the game is played: you are dealt one card face up, and your friend is dealt one card face down. Your friend then makes some true statements, and you have to work out who has the higher card, you or your friend. It's that simple!

Round 2:
You are dealt the Blue King and your friend makes three statements:

1. My card would beat a Green King.
2. Knowing this, if my card is more likely to be a Jack than a Queen, then my card is a King. Otherwise, it isn't.
3. Given all of the information you now know, if my card is more likely to beat yours than not, then my card is Red card. Otherwise, it isn't.

Who has the higher card, you or your friend?

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[Ref: ZVJV] © E.J. Shamblen 

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[Added September 1997]

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