Using high school math to work out the annual interest rate of Kobe Bryant’s brilliant investment

Kobe Bryant became a NBA legend with his smooth moves on the basketball court, it appears that he has some smooth moves off the court as well.  According to espn Kobe Bryant’s 6 million investment grew to become 2oo million in about four and a half years. http://www.espn.com/nba/story/_/id/24384862/kobe-bryant-6m-investment-sports-drink-now-worth-200m   An application of the mathematics taught in the 11th grade is to work out the annual interest rate of Bryant’s investment using the compound interest formula. The following article discusses what investors should consider a “good rate of return”, and suggests that 15% to 20% is high and too much to…

Can you solve the most famous math problem in English Literature? How many were going to St Ives?

The following trick question appeared in the early 19th century in a Mother Goose nursery rhyme: As I was going to St Ives, I met a man with seven wives, Every wife had seven sacks, Every sack had seven cats, Every cat had seven kits, Kits, cats, sacks, wives, How many were going to St. Ives? Answer: 2, 800 do you know how we get this answer?