|1.||2 + 2 = 2 x 2||2.||Three. One of each.|
|3.||81 square metres.||4.||73cm or 0.73 metres.
13 (the other factor) would be ridiculous
|5.||Half a square metre.||6.||49|
It contains all 10 digits, once and once only.
|8.||92p a yard (by 0.6p)|
|9.||£45||10.||52.45 square cm.|
|11.||Each point would be the vertex of regular tetrahedron.||12.||20 cm.|
|13.||4.00 cm (to 3 sig. figs)||14.||The sum of the even numbers (by 50).|
|15.||9 zeros.||16.||7.5 km.|
|17.||24 km.||18.||5 (5 + 5 + 5 + 5) = 100|
|19.||Arranged alphabetically by their spelling.
eight, five, four, nine . . . . two, zero.
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