Go to a doctor and get weighed the doctor will use an equation called body mass index to see if you are the right weight for your age.
1 - 8 - 27 - 64 - 125 - 216 Series of cubes. 1^3 = 1, 2^3 = 8, 3^3 = 27, etc.
Comparable to the easier-to-recognize series of squares: 1 4 9 16 25 36 etc.