The other day I had myself a customer that asked me this question:  "Can you save a penny a day for a month?"  Of course my response was yes.  In return with a grin on his face, "Could you still save a penny a day but every day double the amount you saved the previous day?"  Just for those may get the wrong idea, $0.01 first day, $0.02 the second, $0.04 the third and so on.  Before I could respond he said, "I bet you can't!"

So after a rather legthy discussion with the man and a calculator he was right.  Thankfully I'm not a betting person.  I have put few examples of this below, just show you the math of it all.  The only thing I was able to say to this was, "WOW".

Example One – Saving a penny a day.

Example Two – Saving a penny a day and doubling the amount to save every day.

Example Three – Saving a penny a day and doubling the amount saved every day on top of what is saved so far.

Day	Example 1	Example 2	Example 3
1	$0.01	$0.01	$0.01
2	$0.01	$0.02	$0.03
3	$0.01	$0.04	$0.09
4	$0.01	$0.08	$0.27
5	$0.01	$0.16	$0.81
6	$0.01	$0.32	$2.43
7	$0.01	$0.64	$7.29
8	$0.01	$1.28	$21.87
9	$0.01	$2.56	$65.61
10	$0.01	$5.12	$196.83
11	$0.01	$10.24	$590.49
12	$0.01	$20.48	$1,771.47
13	$0.01	$40.96	$5,314.41
14	$0.01	$81.92	$15,943.23
15	$0.01	$163.84	$47,829.69
16	$0.01	$327.68	$143,489.07
17	$0.01	$655.36	$430,467.21
18	$0.01	$1,310.72	$1,291,401.63
19	$0.01	$2,621.44	$3,874,204.89
20	$0.01	$5,242.88	$11,622,614.67
21	$0.01	$10,485.76	$34,867,844.01
22	$0.01	$20,971.52	$104,603,532.03
23	$0.01	$41,943.04	$313,810,596.09
24	$0.01	$83,886.08	$941,431,788.27
25	$0.01	$167,772.16	$2,824,295,364.81
26	$0.01	$335,544.32	$8,472,886,094.43
27	$0.01	$671,088.64	$25,418,658,283.29
28	$0.01	$1,342,177.28	$76,255,974,849.87
29	$0.01	$2,684,354.56	$228,767,924,549.61
30	$0.01	$5,368,709.12	$686,303,773,648.83
31	$0.01	$10,737,418.24	$2,058,911,320,946.49
Total	$0.31	$21,474,836.47	$3,088,366,981,419.73