| Group | Odd One Out | Reason |
| guanine, adenine, cytosine, arcsine | |
| kilometre, acre, light-year, parsec | |
| Hydrogen, Oxygen, Fluorine, Helium | |
| moneo, fungi, plantae, animalia | |
| Simpson, Sneller, Lindley, Cantor | |
| Galaxy, Milky Way, Comet, Andromeda | |
| Tungsten, Nickel, Titanium, Mercury | |
| Platypus, Whale, Shark, Beaver | |
| Hodge Conjecture, Poincaré Conjecture, Riemann Hypothesis, P versus NP | |
| Gravity, Electromagnetism, Air Resistance, Nuclear Weak | |
| | Group | Odd One Out | Reason |
| 22/7, pi, phi, √3 | |
| Hammer, Lever, Screw, Wedge | |
| Celcius, Fahrenheit, Kelvin, Degrees | |
| Uranus, Venus, Pluto, Mars | |
| Class, Order, Family, Chaos | |
| Cantor, Lorenz, Plato, Euclid | |
| Televisual, Visible, Infrared, Microwave | |
| Helium, Argon, Oxygen, Radon | |
| Conduction, Conflation, Radiation, Convection | |
| top, bottom, strange, normal | |
| guanine, adenine, cytosine, arcsine | |
| kilometre, acre, light-year, parsec | |
| Hydrogen, Oxygen, Fluorine, Helium | |
| moneo, fungi, plantae, animalia | |
| Simpson, Sneller, Lindley, Cantor | |
| Galaxy, Milky Way, Comet, Andromeda | |
| Tungsten, Nickel, Titanium, Mercury | |
| Platypus, Whale, Shark, Beaver | |
| Hodge Conjecture, Poincaré Conjecture, Riemann Hypothesis, P versus NP | |
| Gravity, Electromagnetism, Air Resistance, Nuclear Weak | |
| 22/7, pi, phi, √3 | |
| Hammer, Lever, Screw, Wedge | |
| Celcius, Fahrenheit, Kelvin, Degrees | |
| Uranus, Venus, Pluto, Mars | |
| Class, Order, Family, Chaos | |
| Cantor, Lorenz, Plato, Euclid | |
| Televisual, Visible, Infrared, Microwave | |
| Helium, Argon, Oxygen, Radon | |
| Conduction, Conflation, Radiation, Convection | |
| top, bottom, strange, normal | |
|