| THAC0 = 21 - level - hit bonus | 156 (22.9%) |  |
| Recreation: To Hit Armour Class 0 score for a warrior in Advanced Dungeons & Dragons, 2nd Edition. |
| d/dx ln(x) = 1/x | 94 (13.8%) | |
| Calculus: The derivative of the natural logarithm function is an hyperbola. |
| xn + yn ≠ zn, for n > 2 | 70 (10.3%) | |
| Number theory: Fermat's Last Theorem. |
| sin2θ + cos2θ = 1 | 54 (7.9%) | |
| Trigonometry: One of the most fundamental identities. |
| E = mc2 | 40 (5.9%) | |
| Special relativity: Einstein's famous mass-energy equation. |
| N = R* fp ne fl fi fc L | 37 (5.4%) | |
| Astrobiology: The Drake equation. |
| eiπ + 1 = 0 | 34 (5.0%) | |
| Complex analysis: Euler's identity. |
| BMI = w/h2 | 27 (4.0%) | |
| Health: The formula to calculate Body Mass Index. |
| 1 + 1 = 2 | 23 (3.4%) | |
| Arithmetic: A simple addition. |
| s->c_str()[s->size()] == '\0' | 22 (3.2%) | |
| Computer science: The element of a C-style C++ string at index equal to the string length is a null character. |
| 2H2 + O2 → 2H2O | 22 (3.2%) | |
| Chemistry: Hydrogen and oxygen make water by combustion. |
| HΨ = ih/2π d/dt Ψ | 22 (3.2%) | |
| Quantum mechanics: The Schrödinger wave equation. |
| Eik = 8πG/c4 tik | 14 (2.1%) | |
| General relativity: Einstein's field equation. |
| c = fλ | 12 (1.8%) | |
| Wave motion: Speed of light is the frequency multiplied by the wavelength. |
| ∇2Φ = 0 | 11 (1.6%) | |
| Differential equations: Laplace's equation. |
| a2 = b2 + c2 | 11 (1.6%) | |
| Geometry: Pythagoras' theorem for right angled triangles. |
| Tr{F/Q} = ∑ni=1 σi(f) | 10 (1.5%) | |
| Algebra: Trace of an element in a number field as an extension of the rationals. |
| ∫E.dA = q/ε | 10 (1.5%) | |
| Electromagnetism: Gauss' law. |
| F = ma | 7 (1.0%) | |
| Dynamics: Newton's Second Law |
| B = P(1 + r/n)nt | 6 (0.9%) | |
| Economics: Compound interest formula. |
I've reformatted the equations to look nicer than the raw ASCII in the poll drop-down list.
