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.

Long description

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Verification ISBN preview

Jak sprawdzić numer ISBN?
Jak zweryfikować numer ISBN?

Calculator allows you to verify the ISBN number entered.

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Verifier numbers EAN-13 preview

Verifier numbers EAN-13 Calculator allows you to verify the number entered EAN-13.

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Verification of the ISSN

Calculator allows you to verify the number entered ISSN (International Standard Serial Number serial publication). FAQ: How ISSN number?

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Examine the variability of the quadratic function

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Calculator floor panels

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Indicator of body fatness BAI (Body Adiposity Index)

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Waterproofing balconies [IZOHAN]

Calculator allows to determine the price of IZOHAN materials needed to complete the waterproofing of the terrace of the given dimensions.