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Problems Archives

The problems archives table shows problems 1 to 745. 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.


ID

Description / TitleSolved By
351Hexagonal orchards
2417
352Blood tests
561
353Risky moon
439
354Distances in a bee's honeycomb
407
355Maximal coprime subset
487
356Largest roots of cubic polynomials
542
357Prime generating integers
7748
358Cyclic numbers
1529
359Hilbert's New Hotel
1441
360Scary Sphere
558
361Subsequence of Thue-Morse sequence
274
362Squarefree factors
442
363Bézier Curves
1008
364Comfortable distance
660
365A huge binomial coefficient
1151
366Stone Game III
620
367Bozo sort
468
368A Kempner-like series
513
369Badugi
434
370Geometric triangles
480
371Licence plates
1521
372Pencils of rays
373
373Circumscribed Circles
312
374Maximum Integer Partition Product
625
375Minimum of subsequences
823
376Nontransitive sets of dice
253
377Sum of digits - experience #13
657
378Triangle Triples
791
379Least common multiple count
479
380Amazing Mazes!
463
381(prime-k) factorial
3993
382Generating polygons
308
383Divisibility comparison between factorials
448
384Rudin-Shapiro sequence
305
385Ellipses inside triangles
258
386Maximum length of an antichain
675
387Harshad Numbers
4462
388Distinct Lines
523
389Platonic Dice
1430
390Triangles with non rational sides and integral area
541
391Hopping Game
259
392Enmeshed unit circle
709
393Migrating ants
712
394Eating pie
488
395Pythagorean tree
641
396Weak Goodstein sequence
617
397Triangle on parabola
250
398Cutting rope
346
399Squarefree Fibonacci Numbers
522
400Fibonacci tree game
432