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Problems Archives

The problems archives table shows problems 1 to 751. 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
2443
352Blood tests
572
353Risky moon
448
354Distances in a bee's honeycomb
411
355Maximal coprime subset
497
356Largest roots of cubic polynomials
554
357Prime generating integers
7845
358Cyclic numbers
1543
359Hilbert's New Hotel
1459
360Scary Sphere
563
361Subsequence of Thue-Morse sequence
280
362Squarefree factors
449
363Bézier Curves
1040
364Comfortable distance
673
365A huge binomial coefficient
1169
366Stone Game III
631
367Bozo sort
471
368A Kempner-like series
521
369Badugi
437
370Geometric triangles
493
371Licence plates
1539
372Pencils of rays
380
373Circumscribed Circles
315
374Maximum Integer Partition Product
644
375Minimum of subsequences
835
376Nontransitive sets of dice
257
377Sum of digits - experience #13
668
378Triangle Triples
803
379Least common multiple count
489
380Amazing Mazes!
472
381(prime-k) factorial
4039
382Generating polygons
313
383Divisibility comparison between factorials
454
384Rudin-Shapiro sequence
309
385Ellipses inside triangles
263
386Maximum length of an antichain
686
387Harshad Numbers
4520
388Distinct Lines
534
389Platonic Dice
1448
390Triangles with non rational sides and integral area
546
391Hopping Game
260
392Enmeshed unit circle
725
393Migrating ants
720
394Eating pie
493
395Pythagorean tree
657
396Weak Goodstein sequence
632
397Triangle on parabola
252
398Cutting rope
354
399Squarefree Fibonacci Numbers
532
400Fibonacci tree game
445