Tool/Solveur to find missing number/fill the blanks puzzles/equations (addition, subtraction, multiplication, division)
Missing Numbers Calculator - dCode
Tag(s) : Number Games, Arithmetics
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Solving a calculation with operators and missing digits is similar to a cryptarithm and uses deduction and extraction of parts of the calculation.
Example: Exercise: find ? in the operation ??5 + 42? = 539 => 115 + 424 = 539
Example: 12 + 23 = ? has no solution but 12 + 23 = ?? has for solution 12 + 23 = 35
It is useful to calculate digits at extremities, or check individually calculations to the ten digits, or the hundreds digit etc.
The blanks have to be replaced by ? (interrogation marks). There is no limit but above 7 or 8, the calculation will be very long.
Example: 1+?=3 is solved with 1+2=3
Example: 2*?=8 is solved with 2*4=8
This solver uses a brute-force method, this means that it tries all combinations and display the possible ones.