Question: what are the most important numbers in mathematics?
Answer: Archimedes' Constant (Pi): 3.1415... ... 
Euler's Number (e): 2.7182... ... 
The Golden Ratio: 1.6180... ... 
Planck's Constant: 6.626068 x 10^-34 m^2 kg/s. ... 
Avogadro's Constant: 6.0221515 x 10^23. ... 
The Speed of Light: 186,282 miles per second.