MathBeasts Demo

Complete MathBeasts catalog

39 beasts in five families

From the BeastScholar catalog. Track tags are proposed instructional mappings, not claims about any college’s requirements. Only Denominator Danny, Distributor Dee, One-Side Wes are playable on this site.

Showing 39 of 39

• Place-Value PipInventory

  1|0 · Whole numbers & place value · Foundations

  Lines numbers up by their left-hand digits instead of by place value.

• Rounding RogueInventory

  ≈ · Estimation & rounding · Foundations

  Rounds intermediate results, so the error compounds before the final answer.

• Sign-Switch SamInventory

  ± · Signed numbers · Foundations

  Treats subtracting a negative as subtracting, and mis-signs products of negatives.

• Denominator DannyPlayable sample

  a⁄b · Fractions · Foundations

  Adds the denominators when adding fractions with unlike denominators.

• Decimal DriftInventory

  .0 · Decimals · Foundations

  Places the decimal point in a product by copying one factor's places.

• Ratio RipperInventory

  a:b · Ratios & proportions · Foundations

  Reverses which quantity each part of a ratio describes.

• Percent PhantomInventory

  % · Percentages · Foundations

  Converts a percent to a decimal by moving the point one place instead of two.

• Order-of-Ops OllieInventory

  ( ) · Order of operations · Foundations

  Works strictly left to right, ignoring grouping and operation precedence.

• Like-Term LarryInventory

  x+x² · Like terms · Algebra

  Combines terms with different powers as if they were like terms.

• Distributor DeePlayable sample

  a(b+c) · Distribution · Algebra

  Multiplies only the first term inside the parentheses.

• One-Side WesPlayable sample

  = · Equality & linear equations · Algebra

  Applies an operation to only one side of an equation.

• Flip-Flop FionaInventory

  <> · Inequalities · Algebra

  Keeps the inequality direction after multiplying or dividing by a negative.

• Exponent EzraInventory

  xⁿ · Exponents · Algebra

  Adds exponents when raising a power to a power.

• Binomial BrunoInventory

  (a+b)² · Polynomials & factoring · Algebra

  Squares a sum term by term, dropping the middle term.

• Canceling CarlInventory

  ⧸ · Rational expressions · Algebra

  Cancels a term that is added, rather than a common factor.

• Root-Split RheaInventory

  √ · Radicals · Algebra

  Splits a square root across a sum.

• Swap-Coord CoraInventory

  (x,y) · Coordinates · Functions & Graphs

  Plots (x, y) with the coordinates swapped.

• Rise-Run RudyInventory

  Δy/Δx · Slope · Functions & Graphs

  Computes slope as run over rise.

• Intercept IggyInventory

  ⊥ · Intercepts · Functions & Graphs

  Finds the x-intercept by setting x = 0.

• Notation NedInventory

  f(x) · Functions · Functions & Graphs

  Reads f(x + 2) as f(x) + 2.

• Half-Solve SullyInventory

  { } · Systems of equations · Functions & Graphs

  Reports one variable's value as the whole solution of a system.

• Root-Drop QuillInventory

  ± · Quadratics · Functions & Graphs

  Keeps only the positive root when solving a squared equation.

• Linear LyleInventory

  ×1.1 · Exponential growth · Functions & Graphs

  Treats a constant percent growth rate as adding a constant amount.

• Log LarsInventory

  log · Logarithms · Functions & Graphs

  Treats the log of a sum as the sum of logs.

• Unit UrsulaInventory

  m/s · Units & conversions · Quantitative Reasoning

  Combines measurements in different units without converting.

• Rate ReggieInventory

  mi/h · Rates · Quantitative Reasoning

  Averages two speeds directly when the times differ.

• Rate-Period PetraInventory

  APR · Financial math · Quantitative Reasoning

  Applies an annual interest rate to a single monthly period.

• Markdown MortInventory

  ±% · Percent change · Quantitative Reasoning

  Assumes a percent increase and the same percent decrease cancel.

• Area-Scale ArchieInventory

  k² · Geometry & measurement · Quantitative Reasoning

  Thinks scaling lengths by k scales area by k.

• Trendline TrixieInventory

  ↗ · Modeling · Quantitative Reasoning

  Extends a model far beyond the data it was built from.

• Magnitude MaxInventory

  10ⁿ · Reasonableness · Quantitative Reasoning

  Accepts an answer without noticing it is the wrong size.

• Axis AxelInventory

  ▮▯ · Interpreting graphs · Statistics & Probability

  Reads bar heights on a truncated axis as proportional to the values.

• Median MabelInventory

  x̃ · Center · Statistics & Probability

  Takes the middle value of an unsorted list as the median.

• Spread SpencerInventory

  σ · Spread · Statistics & Probability

  Thinks bigger values mean more spread.

• Gambler GusInventory

  ⚀ · Probability · Statistics & Probability

  Believes independent outcomes are 'due' after a streak.

• Converse ConnieInventory

  P(A|B) · Conditional probability · Statistics & Probability

  Treats P(A | B) as if it were P(B | A).

• Volunteer VeraInventory

  ✋ · Sampling & bias · Statistics & Probability

  Generalizes from a voluntary-response sample to a whole population.

• Causal CalInventory

  r · Association & causation · Statistics & Probability

  Concludes causation from an observed correlation.

• P-Value PenelopeInventory

  p · Statistical inference · Statistics & Probability

  Reads a p-value as the probability the null hypothesis is true.