Convert a given number to its Roman representation.
For example, if the number is 98, it should display 'XCVIII'
copy of Problem 63.
Test if a Number is a Palindrome without using any String Operations
Remove white space from the string
Matrix multiplication across rows
Area of a Square
Concatenate two strings
Create the following sequence : 0 1 1 4 9 25 64 169 ...
Find the area of the four walls
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