Given four coordinates, write a function to check if they form a square on the XY plane.
give nth decimal place of pi
Is A the inverse of B?
Penny flipping - calculate winning probability (easy)
MATLAB Basic: rounding II
Ratio between sum of primes and sum of factors
Ratio between sum of primer numbers and non-prime numbers
Sum of a geometric series
Get the value 100
Approximate the inverse tangent by power series
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