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Problems Archives

The problems archives table shows problems 1 to 667. If you would like to tackle the 10 most recently published problems then go to Recent problems.
Click the description/title of the problem to view details and submit your answer.


IDDescription / TitleSolved By
651Patterned Cylinders
122
652Distinct values of a proto-logarithmic function
127
653Frictionless Tube
223
654Neighbourly Constraints
239
655Divisible Palindromes
324
656Palindromic sequences
180
657Incomplete words
300
658Incomplete words II
163
659Largest prime
489
660Pandigital Triangles
213
661A Long Chess Match
162
662Fibonacci paths
411
663Sums of subarrays
215
664An infinite game
133
665Proportionate Nim
172
666Polymorphic Bacteria
168
667Moving Pentagon
134