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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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Verifier numbers EAN-13 preview
Verifier numbers EAN-13
Calculator allows you to verify the number entered EAN-13.
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Math
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Calculator allows you to calculate the probability of a given number of successes with a specified number of trials and probability of success.
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Life
Rainwater tank
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Calendar
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Calculator allows you to calculate the date, which will be after a specified number of days, months and years from a certain date.