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?
The Goldbach Conjecture, Part 2
Arrange Vector in descending order
Sophie Germain prime
sum of first 'n' terms
Perfect Square or not
Speed of light:Experiment
How many rectangles in a grid ?
center of mass
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