Middle schoolers who do MATHCOUNTS can easily understand base nu

来源: 于 2015-04-27 10:49:03 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

Middle schoolers who do MATHCOUNTS can easily understand base numbers.


For example:  Find the 111th smallest positive integer which does not have 3 and 4 in its base-5 representation?