| Average annual income | of a typical American family (50) |
| Cost | of a luxury car (50) |
| Seconds | in one hour (4) |
| Distance in miles | (a) a spaceship can travel in one hour (25) |
| (b) from the earth to the moon (237) |
| Diameter in miles | (a) of the earth (8) |
| (b) of the sun (864) |
| Different species | (a) of animals with backbones |
| includes mammals, fish, birds, reptiles and amphibians (28) |
| (b) of flowering plants (250) |
| (c) beetles, the most varied order in all kingdoms (375) |
| People | that fit into a stadium (100) |
| Letters | (a) on the DNA of one of the smallest known viruses (5) |
| (b) on a typical page of printed text (2-3) |