Guess the password or break the lock.
And this problem is much easier than others you solved here!! ;-)
Sorry, I was tempted by the 'break the lock' part... :)
Finding Perfect Squares
Check if sorted
Back to basics 21 - Matrix replicating
sum of non-primes
Don't Try, give up and return NaN.
How many solutions has this problem?
Polite numbers. N-th polite number.
(Linear) Recurrence Equations - Generalised Fibonacci-like sequences
Packing oranges - one layer
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