Guess the formula to transform strings as follows:
'Hello World!' --> 'Ifmmp Xpsme!'
'Can I help you?' --> 'Dbo J ifmq zpv?'
Simple and interesting.
How many trades represent all the profit?
Multiply 2 numbers
Multiples of a Number in a Given Range
Generate a random matrix A of (1,-1)
Perfect Square or not
Handle to an array of functions
Two-output anonymous function?
Raise Matrix to Power
Create an 'arrow-head" matrix
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