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The sum of squares of integers from 1 to n

The calculator calculates the sum of squares of consecutive integers from one to the specified value.      


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Weighted average ratings

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Conversion between number bases

Converter allows you to convert numbers between number bases - binary (binary), trójkowym, czwórkowym, Friday, szóstkowym, siódemkowym, octal (octal), dziewiątkowym, decimal (decymalnym) jedenastkowym, dwunastkowym, trzynastkowym, czternastkowym, piętnastkowym, hexadecimal (hex). Typed characters that are not numbers and the letters A, B, C, D, E, F are ignored.      
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Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values ​​of the basic trigonometric functions.
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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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Alcohol Calculator - witrualny breathalyzer online converter

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Verifier numbers Postnet

Calculator allows you to verify the number entered Postnet.          
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Calculator based on the values ​​entered pressure and volume of the selected parameter is calculated using Boyle's Law states / Mariotte.                  
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Calculator download speeds

Calculator allows you to calculate the approximate download time on a given value for a circuit given parameters.