Prompt 2 of 7
Name a math symbol
72 accepted answers across 6 rarity tiers.
100 ptsOne in a Krillion2 answers
The rarest possible answer — almost no player finds it.
- Aleph— Cantor's symbol for measuring different sizes of infinity itself.
- Nabla— Named for an ancient harp whose triangular shape it resembles.
85 ptsDeep Cut37 answers
Genuinely obscure. Most players never think of it.
- Angle symbol
- Arrow
- Because symbol— Upside-down therefore, meaning 'since' at the top of proofs.
- Chi
- Congruent sign
- Element of symbol
- Empty set symbol
- Epsilon
- Euler's number
- Floor brackets
- For all symbol
- Gamma
- Integral sign— Leibniz's elongated 'S' stands for the Latin word summa.
- Intersection symbol
- Lambda
- Long division symbol— Its official Unicode name is simply 'long division.'
- Modulo
- Mu
- Not sign
- Omega
- Parallel symbol
- Partial derivative symbol
- Per mille sign— Percent's stricter sibling, meaning parts per thousand instead of per hundred.
- Perpendicular symbol
- Prime symbol
- Product notation— Sigma's multiplying cousin, taking the product of a sequence instead.
- Proportional to symbol
- QED symbol— A small square used instead of writing out 'quod erat demonstrandum.'
- Rho
- Subset symbol
- Summation sign— Capital sigma tells you to add up every term in a sequence.
- Tau
- There exists symbol
- Therefore symbol— Three dots in a triangle, meaning 'as a result' in proofs.
- Triple bar
- Union symbol
- Zeta
60 ptsRare17 answers
Uncommon — only a minority of players land here.
- Absolute value bars
- Alpha
- Approximately equal sign
- Beta
- Braces
- Brackets
- Caret
- Colon— Reads as 'to' in a ratio such as 3:4.
- Degree sign
- Delta
- Ellipsis— Stands in for the terms you skipped writing out.
- Factorial— 5! means 5×4×3×2×1, which equals 120.
- Fraction bar
- Not equal sign
- Parentheses
- Plus-minus sign
- Theta
30 ptsSchooler9 answers
A solid, middling pick shared with plenty of other players.
- Asterisk— Doubles as the multiplication sign on any keyboard or spreadsheet.
- Decimal point
- Greater than sign
- Infinity symbol
- Less than sign
- Percent sign
- Pi
- Slash— Shorthand for division in fractions and ratios, like 3/4.
- Square root sign
15 ptsToo Clever2 answers
An overthought pick that scores below the middle of the board.
- Golden ratio— Divides a line so the parts mirror the whole's proportion.
- Imaginary unit— Squaring it gives negative one, which no real number manages.
10 ptsPlankton5 answers
The most common answer on the board.
- Division sign
- Equals sign
- Minus sign
- Multiplication sign
- Plus sign