Times 2 - START HERE
Flip the main diagonal of a matrix
Return the first and last character of a string
Check if number exists in vector
Beginner's Problem - Squaring
Simple date to serial no. conversion
CONVERT TAN TO SIN
give-nth-decimal-place-of-pi up to 100 digits
check wether armstrong no or not
given 4x4 matrix swap the two middle columns
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