30th September 2005 at 01:00
Nico's cards

Nico has four number cards. Each card is different. Each card is less than 9. The four cards add up to 18. What are they? Find seven ways to do it.

Fractions to decimals

What fraction, when you turn it into a decimal, starts: 0.010989 ...

What fraction, when you turn it into a decimal, starts: 0.0188679 ...

SOLUTIONS Nico's cards (ages 6 to 9): Four cards with a total of 18 could be: 1, 2, 7, 8; 1, 3, 6, 8; 1, 4, 5, 8; 1, 4, 6, 7; 2, 3, 6, 7; 2, 4, 5, 7; 3, 4, 5, 6. Fractions to decimals (ages 11-16): Recognising that the first fraction is a little more than one hundredth and that the second one is a little less than one fifitieth leads to the two fractions 191 and 153.

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