| Hint | Answer | % Correct |
|---|---|---|
| ∞ | infinity | 100%
|
| | x | | absolute value | 76%
|
| n! | factorial | 67%
|
| ∪ | union | 46%
|
| ∴ | therefore | 31%
|
| ∏ | product of a series | 30%
|
| ∀ | for all | 27%
|
| ⇔ | equivalent/if and only if | 25%
|
| ∝ | proportional to | 25%
|
| ≫ | much greater than | 22%
|
| ¬ | not | 21%
|
| ≅ | congruent to | 19%
|
| ∨ | or | 16%
|
| [a,b] | closed interval | 9%
|
| ∃! | there exists exactly one | 6%
|