Least common multiple calculator
Find the smallest non-negative common multiple of two integers.
Open calculatorMaths & numbers
Everyday percentages, sequences and the numbers in between.
Showing 217–240 of 253 tools
Arithmetic sequence calculator
Find the nth term and sum of a sequence with a fixed difference.
Open calculatorGeometric sequence calculator
Find the nth term and sum when each term multiplies by a fixed ratio.
Open calculatorAttendance target calculator
Find a consecutive attended-class requirement and a current absence allowance from an entered threshold.
Open calculatorFinal exam target calculator
Solve the final-score requirement from a normalized current grade, final weight and target course percentage.
Open calculatorMulti-part ratio simplifier and sharing calculator
Simplify two to twenty nonnegative ratio terms and distribute a supplied quantity into exact proportional shares.
Open calculatorCoordinate point set calculator and plotter
Plot unjoined Cartesian points, identify quadrants and axes, and calculate exact mean coordinates, reflections and bounding extents.
Open calculatorPolynomial Riemann sums calculator
Compare left, right and midpoint rectangle sums with an exact polynomial integral and an SVG explanation.
Open calculatorPrime factorization and divisors calculator
Find exact prime powers, the count of positive divisors and their sum in one worked breakdown.
Open calculatorModular exponentiation calculator
Compute a large exponent modulo a whole number using repeated squaring and inspect each selected power.
Open calculatorLinear congruence solver
Solve a·x ≡ b modulo m, including cases with multiple residues or no solution.
Open calculatorChinese remainder theorem calculator
Combine two congruences with coprime moduli into one exact residue class.
Open calculatorEuler totient calculator
Count integers coprime to n from 1 through n using its distinct prime factors.
Open calculatorMultiplicative order calculator
Find the first positive power of a that gives remainder one modulo m.
Open calculatorRational continued fraction calculator
Expand a rational number into a finite simple continued fraction and inspect every convergent.
Open calculatorRepeating decimal to fraction calculator
Turn a stated repeating decimal block into an exact reduced fraction, including a non-repeating prefix.
Open calculatorInteger base converter
Convert a signed whole number between numeral bases 2 through 36 without floating-point rounding.
Open calculatorFibonacci sequence and term calculator
Find an exact indexed Fibonacci number, inspect early terms and sum through the selected index.
Open calculatorChmod permissions and umask calculator
Calculate octal permission bits, symbolic display and a separate new-object umask example.
Open calculatorWeighted GPA calculator with course credits
Calculate a credit-weighted GPA from your grade points, optional course bonuses and an explicit maximum point value.
Open calculatorUnit price comparison calculator
Compare multipack offers on the same kilogram, litre or item basis, including the percentage saving relative to offer A.
Open calculatorLinear equation solver with balancing steps
Solve ax+b=cx+d with balancing steps, substitution checks and a graph of the two linear expressions.
Open calculatorLinear inequality solver with sign-reversal steps
Solve ax+b < cx+d or its inclusive and greater-than variants, with explicit boundary inclusion and sign reversal.
Open calculatorPolyhedral dice roller for d4 d6 d8 d10 d12 d20 and d100
Roll one to one hundred virtual polyhedral dice with individual results, a total and a visual roll display.
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