Puzzles to test mathematical skills, set by Anita Straker. Solutions below More brainteasers on

* Squares and crosses

This shape is known as a Greek cross. Each edge is the same length. Make a Greek cross and cut it into four pieces by cutting along the dotted lines as shown.

Rearrange the four pieces to form two identical squares.

Now take two identical Greek crosses. Cut each into four pieces along the dotted lines as shown. This time each dotted line joins the midpoints of two of the edges.

Rearrange the eight pieces to form one complete square.

SOLUTION Squares and crosses (age six to 11)

* Alphabet letters

Use all the letters A to H.

Write one letter in every circle so that consecutive letters are not joined by lines.

SOLUTION Alphabet letters (ages 8 to 13) Other solutions are possible

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