考大家一道小学三年级的数学题

来源: 于 2013-09-12 08:11:25 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

What is the missing number in this series?

73, 12, 6, 3, 5,      , 4, 4

(1) 10 (2) 55 (3) 6 (4) 20 (5) 4