Answers

2015-07-10T22:12:48+08:00
A. 27     (1,3,9,7,27)
B. 38     (1,2,19,38)
C. 56     (1,2,4,7,8,14,28,56)
D. 72     (1,2,3,4,6,8,9,12,18,24,36,72)
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2015-07-11T09:44:01+08:00
A.27=1,3,9,27
b.38=1,2,19,38
c.56=1,2,4,7,8,16,28,56
d=1,2,3,4,6,8,9,12,18,24,36,72
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