20790
Verifiers
NIP correctness in Poland
Jak sprawdzić poprawność numeru NIP?
Verifier allows you to validate the tax identification number entered
Tax identification number is a code used to identify taxpayers in Poland, which consists of 10 digits.
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78729
Verifiers
Verification ISBN preview
Jak sprawdzić numer ISBN?
Jak zweryfikować numer ISBN?
Jak zweryfikować numer ISBN?
Calculator allows you to verify the ISBN number entered.
65479
Verifiers
Verification of the social security number in Poland
It presents data deriving from the unique social security number, such as date of birth, sex, serial number and check its correctness.
55586
Verifiers
Verifier numbers EAN-13 preview
Verifier numbers EAN-13
Calculator allows you to verify the number entered EAN-13.
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Life
Calculator degrees Plato / Brix
The calculator calculates the sugar content of a drink in degrees Plato and Brix and the volume of alcohol in the solution based on the relative density of the solution.
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Insulation of wall
Jak policzyć izolację ścian?
Calculator allows you to calculate the amount of insulation panels needed to cover the walls of the building using the "light wet" or "dry light" methods.
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Number cheerful
Checks the calculator is a large number of so-called gay (Happy Number). Number gay is a natural number is defined as follows: Calculate the sum of squares of digits of the number. Repeat this process for the next results as long as we get the number 1 or the results will be repeated. If you have received as a result of one, the original number is the number of gay. Otherwise, a number bleak.
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Dilution of solutions
Legend of given volume and calculates the concentrations of the solutions before and after dilution of the volume of solution added is calculated.
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Verifiers
Verification of the social security number in Poland
It presents data deriving from the unique social security number, such as date of birth, sex, serial number and check its correctness.