Cleave Books Answers to Quick Puzzles 4
1.  2 + 2 = 2 x 2 
2.  Three. One of each. 
3.  81 square metres. 
4.  73 cm or 0.73 metres. 13 (the other factor) would be ridiculous 
5.  Half a square metre. 
6.  49 
7.  9814072356 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. 
20.  18 
