Stupid Math Tricks I

Ah, the Fibonacci Sequence...how will I ever use that in my day-to-day life?  Turns out the relationship between miles and kilometers is pretty close for reasonable values:

5 miles is about 8 kilometers...

km	mi	mi	km
2	1.24	1	1.61
3	1.86	2	3.22
5	3.1	3	4.83
8	4.97	5	8.05
13	8.07	8	12.87
21	13.04	13	20.92
34	21.12	21	33.8
55	34.17	34	54.72
89	55.3	55	88.51
144	89.48	89	143.23
233	144.78	144	231.75
377	234.26