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Sum digits in string
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Difficulty level Date added
Numbers from range Easy
Minimum length Easy
Select words Easy
Top 5 numbers Easy
Square greater than 20 Easy
Replace substring Easy
Last word containing letter Easy
Shuffle an array Medium
Decrypt number Medium
Most frequent character Medium
Unique values Medium
Uppercase only Medium
Arrays dot product Medium
Frequency of letters Medium
Days names Hard
Double letters Hard
Transpose an array Hard
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