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Whether a number is prime

Checks the user number is a prime number.


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Weighted average ratings

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Conversion between number bases

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Trigonometric functions calculator

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Calculator spending on cigarettes

Calculator based on the price quoted for the package and the amount consumed per month package, gives the annual cost of smoking cigarettes.
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Associated ceiling material thickribs

Calculator allows you to calculate the approximate consumption of materials per 1 m2 rib ceiling with ceramic and concrete.
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Fibonacci series

Calculator generates an n initial words of the Fibonacci sequence