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Number of square-triangle has the properties of a square and a triangular number.          


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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

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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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 Verifier numbers EAN-8 Calculator allows you to verify the number entered EAN-8.          
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Distribution of the factors

Calculator performs decomposition of the given number of factors that are prime numbers (factorization).