1.1. 1/2 + 1/4 = ?
1.2. 1/2 + 1/4 + 1/8 = ?
1.3. 1/2 + 1/4 + 1/8 + 1/16 = ?
1.4. 1/2 + 1/4 + 1/8 + 1/16 + 1/32 + ... = ?
Draw a picture to help you imagine what happens in 1.4.
Source: Calculus By and For Young People (ages 7, yes 7 and up),
1988, by Donald Cohen
Source: The Math Forum
http://forum.swarthmore.edu
3.30. Which of the following is divisible by 2, 3, 4, and 5?
A) 2001
B) 2010 C) 2100 D) 2110
3.33. Find the largest prime factor of 30 x 40 x 50.
3.38. When the last 3 digits of a year (such as 1987) are consecutive digits written in descending order, we'll call the year a descending year. A descending year will next occurs in which century?
3.39. A circle has an area of 36pi?. What is the area of the smallest square that can surround the circle?
Source: The Math League
http://www.mathleague.com
Don Braffitt