March 18, 2010


If you have black socks and brown socks in your drawer, mixed in a ratio of 4 to 5, how many socks will you have to […]
March 18, 2010

Water lilies

Water lilies double in area every 24 hours. At the beginning of summer there is one water lily on the lake. It takes 60 days for […]
March 11, 2010

Smith Family

In the Smith family, there are 7 sisters and each sister has 1 brother. If you count Mr. Smith, how many males are there in the […]