04/02/2013 - Got Any Change? (**)

This puzzle is rated 2 star (medium).

Description

British coin change comes in various amounts.  Less than the pound coin (which is equal to 100 pence) there is the 1 pence piece, the 2 pence piece, the 5 pence piece, the 10 pence piece, the twenty pence piece and the fifty pence piece.

Puzzle

What's the most amount of money you can have, with all of your coins being less than a 1 pound coin, so that you DON’T have change of £1, i.e. you can't have 2 fifty pence pieces because they equal 1 pound.

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03/02/2013 - Fifteen (*)

This puzzle is rated 1 star (easy)

Description

Write down the numbers 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.

Puzzle
How many ways can you add 3 of the number 0 to 9 (inclusive) to make 15?

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02/02/2013 - It Equals 1 (***)

This puzzle is rated 2 star (medium).

Description

Use the fraction layout shown above, where there is one digit "over" two others.

Puzzle
Using the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 construct three fractions were one digit is over two others (e.g. 1/23) so that when the three fractions are added together equal 1.

You must use each number once and once only.

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01/02/2013 - Spoke II (**)

This puzzle is rated 2 star (medium).

Description
Draw the spoke diagram as shown below, placing the number 7 in the top circle.

 

Puzzle
Using the numbers 1, 2, 3, 4, 5 and 6, place one number in each circle so the every three numbers on a straight line equal each other.

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31/01/2013 - Zero (**)

This puzzle is rated 2 star (medium).

Description

Create a triangle with 4 squares on each side (9 squares in total) like the one shown above.

Puzzle
Put the number -4, -3, -2, -1, 0, 1, 2, 3 and 4 into the squares so that each side equals 0.

Check the solutions page for the correct solution.