list of classical problems
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| ID | NAME | CODE | USERS | ACC % |
|---|---|---|---|---|
| 34103 | Chiaki Sequence | A001856 | 10 | 22.41 |
| 34112 | The Sum of Unitary Divisors | UDIVSUM | 65 | 31.68 |
| 34117 | Just a Palindrome | JUSTAPAL | 27 | 8.64 |
| 34127 | Gray Code and Twos Complement | GCATC | 14 | 10.84 |
| 35582 | Fibonacci Power Sum (hard) | FIBPSUM2 | 13 | 29.69 |
| 35631 | Moon Safari (Extreme) | MOON4 | 9 | 30.26 |
| 35674 | COLORFUL ARRAY | CLFLARR | 1656 | 41.33 |
| 35675 | Primes in GCD Table (Hard) | PGCD2 | 9 | 30.77 |
| 35716 | Trending GCD (Hard) | TGCD2 | 14 | 43.24 |
| 36533 | Gentleman s Wallet | VZLA2019G | 53 | 40.87 |
| 37375 | Kingdom of Equality | KEQUALITY | 11 | 40.96 |
| 38331 | Comet Number | CPDUEL5A | 79 | 35.05 |
| 39219 | Brenden Politeness Filter | BPF1 | 46 | 47.15 |
| 39786 | Selling Greeting Cards | SLNCRD | 89 | 24.56 |
| 41823 | Martia Auris 3020 | MARTIA_AURIS | 6 | 50.00 |
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