Solution to challenge 12

Solution by Lithuanian students

Begin by folding the string in half along its length; this will be 1/3 m.

Fold the 1/3 m length in half, giving 1/6 m.

Finally fold the 1/6 m length back along the length of the string.

The remaining length will be 2/3 1/6 = 1/2 m.

Some answers to challenge 12 from Poland

Autumn in Germany

Answer for challenge 12 from Greece

 

We bend the string in two equal halves. This is equal to 1/3 of the meter. We bend it again in two equal halves. This is 1/6 of the meter. We cut it off and the rest of the string is half a meter.

Pupils of Gymnasio Soufli.

 

Challenge 12 (for 10-11 years students)

A piece of string measures 2/3 m. Without the use of any other measuring tools, how would you use the string to measure 1/2 m?

Challenge 11: Some answers from Spain...

Autumn in Lithuania from Laima Cepulinskiene