Calculators

Six discrete math calculators

Interactive discrete math for CS students: topics, proof trainer, practice, and browser-native tools.

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What is in here

7topics
534problems
54formulas
60proof tasks
0 learned0 saved0 practice attempts0% accuracy0 proof checks

Calculators

Discrete math tools

Six calculators that run entirely in this browser. Inputs are validated, so a rejected entry says what is wrong instead of returning a confident wrong answer.

Number theory

GCD / LCM

Greatest common divisor and least common multiple, computed exactly - the LCM is arbitrary-precision, so large coprime inputs stay correct.

Commas or spaces, up to 12 values. Anything that is not a whole number is named back rather than coerced.

Try
numbers
84, 126, 210
gcd
42
lcm
1260