If you went to work for a company and asked them to pay you a penny the 1st day, 2 the 2nd day, 3 the 3rd day. How long would it take you to become a millionaire?
2006-12-10 09:26:36 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Thank you for all the helpful answers! My brother and I were just talking about if it would be worth it, it's not like for homework or anything!
Anjie if it's stupid then why did you waste your time answering?! Duh! haha
2006-12-10 09:52:55 · update #1
14,142.63563 days to be precise, but thats obviously nonsense. Therefore the answer is 14,143 days, or around 38 years, 9 months. Ouch!
2006-12-10 09:36:22 · answer #1 · answered by drummanmatthew 2 · 1⤊ 0⤋
1 + 2 + 3 + ... + n = 10^8 pennies
The formula for the sum from 1 to n is n(n + 1) / 2
Therefore, n(n + 1) / 2 = 10^8
n(n + 1) = 2*10^8
n^2 + n - 2*10^8 = 0
Using the quadratic formula gives :
n is approximately 4999.5.
So on day 4999, you would not yet be a millionaire.
But on day 5000 , you would.
This is approximately 13 years, 8 1/4 months.
2006-12-10 18:08:11 · answer #2 · answered by falzoon 7 · 0⤊ 0⤋
Each day you've earned a total of (1 + 2 + ...+ n) pennies.
So to earn 100,000,000 pennies...
Sum after n days = 1/2 n(n + 1)
100,000,000 = 1/2 n(n+1)
200,000,000 = n^2 + n
Use the quadratic formula to solve...
2006-12-10 17:31:16 · answer #3 · answered by Anonymous · 0⤊ 0⤋
WHO CARES? Who would be paid in pennies anyway? That's stupid
2006-12-10 17:35:33 · answer #4 · answered by Anonymous · 0⤊ 2⤋
its 30 days
http://mathforum.org/library/drmath/view/56898.html
2006-12-10 17:36:38 · answer #5 · answered by andygos 3 · 0⤊ 0⤋
get a calculator figure it out lazybutt!!!
LOL=D
its not actually THAT simple...
2006-12-10 17:30:35 · answer #6 · answered by Kim 4 · 1⤊ 2⤋
100,000,000 days.
2006-12-10 17:29:34 · answer #7 · answered by rhcpafifan 3 · 0⤊ 1⤋