Verifiers

Verification of the ISSN

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

Long description

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Verifiers

Verification ISBN preview

Jak sprawdzić numer ISBN?
Jak zweryfikować numer ISBN?

Calculator allows you to verify the ISBN number entered.

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It presents data deriving from the unique social security number, such as date of birth, sex, serial number and check its correctness.

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

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Jak sprawdzić numer ISBN?
Jak zweryfikować numer ISBN?

Calculator allows you to verify the ISBN number entered.

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Checks the user number is a prime number.

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Multiplication table 20 × 20 gives the opportunity to multiply their arbitrary natural numbers (1-20).