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Sum digits in string
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Difficulty level Date added
Multiplication table Easy
Fractions sum Easy
Sort array ascending Easy
The biggest number Easy
Two 7s next to each other Easy
Three increasing adjacent Easy
Return even numbers Easy
Sieve of Eratosthenes Medium
Draw hourglass Medium
Draw parallelogram Medium
Draw Christmas tree Medium
Extract string Medium
Full sequence of letters Medium
Longest strictly increasing sequence Medium
Bits to number Medium
Digits sum Medium
Sum and average Medium
Sum double only Medium
Draw triangle Medium
To the power of Medium
Letters balance Medium
Replace two words Medium
Digital root Hard
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