A cylinder H cm high has a circumference of C cm. A string makes exactly N complete turns round the cylinder while its two ends touch the cylinder's top and bottom. How long is the string in cm?
Back to basics 13 - Input variables
How long is the longest prime diagonal?
sum of non-primes
Natural numbers in string form
Which way to go?
center of mass
Recursive Standard Deviation
How many rectangles in a grid ?
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