What is this digit operation?
0 -> 0
1 -> 9
121 -> 9
44 -> 6
15 -> 5
1243 -> 7
Get the area codes from a list of phone numbers
Set some matrix elements to zero
Doubling elements in a vector
Who is the smartest MATLAB programmer?
Area of a circle
I want to know everything!
Can you beat the lottery again (for hardcore coder) ?
Expression or variable?
Numbers spiral diagonals (Part 2)
Find my secret number
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