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Verifiers
Is the phrase is a palindrome
Calculator checks to see if the specified expression is a palindrome. Palindrome - sounding words as read from left to right and from right to left.
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Verification ISBN preview
Jak sprawdzić numer ISBN?
Jak zweryfikować numer ISBN?
Jak zweryfikować numer ISBN?
Calculator allows you to verify the ISBN number entered.
64830
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.
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Verifiers
Verifier numbers EAN-13 preview
Verifier numbers EAN-13
Calculator allows you to verify the number entered EAN-13.
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Math
Field and circumference of a circle
Jak obliczyć pole i obwód koła?
The calculator based on the specified radius of the area and perimeter of a circle.
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Legal
Legal calculator
Calculates the effective date of the act, published in the official journal.
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The harmonic mean
Calculator based on the entered numbers separated by commas calculate the harmonic mean.
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Health
Maximum Heart Rate
The calculator allows you to calculate the index of maximum heart rate (MHR) for your body
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Financial
Limit calculator, which entitles them to exemption from VAT in Poland
Calculator allows you to see what gives you the right amount of turnover for exemption from VAT if you started a business during the year.