### The 900th BAB

GDT thought it would be fun for the 900th BAB to be a "special" (or bablishish) BAB, but he decided to make the 900th BAB a BAB about being the 900th BAB (i.e. YABAB -- Yet Another BAB About BABs).

This 900th BAB was BAB number 138 for the Spring 2007 semester. At the time of this BAB, there were 29 BAB collections. BARS (Basic Arithmetic Road Signs) was the largest BAB collection with 224 BARS.

This 900th BAB was created on 29 March 2007; `778 days` since the creation of the first BAB on 9 February 2005.

##### Exercises
1. List the prime factors for `number 900`.

2. `900` is a square number because `____ squared` equals `900`.

3. The previous square numbered BAB before the 900th BAB was BAB number `841`. The next square numbered after the 900th BAB will be BAB number `________`.

4. As of this BAB's create date, BABs are created at a rate of `_________ BABs per day`. [round to nearest tenth]

5. According to the Wikipedia, in the base-10 number system, number 900 is a "Harshad number" because it is an "integer that is divisible by the sum of its digits in a given number base." Explain why `number 84` is a Harshad number in the base-10 number system.

Creator: Gerald D. Thurman [gthurman@gmail.com]
Created: 29 March 2007