Duplicate all elements in the array
The solution to this problem doesn't make any sense!!!
If you are using the word "duplicate" to mean multiply by 2, then the correct answer is [2,4,6], not [1,4,6]
Flip the main diagonal of a matrix
Find the logic
Who invented zero?
kmph to mps
Is It a Palindrome?
Calculate the square root of a number
to the 2 all elements
Convert characters into numbers
Converts numbers into characters
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