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Problems


IDDescription / TitleSolved By
301
Nim
302
Strong Achilles Numbers
303
Multiples with small digits
304
Primonacci
305
Reflexive Position
306
Paper-strip Game
307
Chip Defects
308
An amazing Prime-generating Automaton
309
Integer Ladders
310
Nim Square
311
Biclinic Integral Quadrilaterals
312
Cyclic paths on Sierpiński graphs
313
Sliding game
314
The Mouse on the Moon
315
Digital root clocks
316
Numbers in decimal expansions
317
Firecracker
318
2011 nines
319
Bounded Sequences
320
Factorials divisible by a huge integer
321
Swapping Counters
322
Binomial coefficients divisible by 10
323
Bitwise-OR operations on random integers
324
Building a tower
325
Stone Game II
326
Modulo Summations
327
Rooms of Doom
328
Lowest-cost Search
329
Prime Frog
330
Euler's Number
331
Cross flips
332
Spherical triangles
333
Special partitions
334
Spilling the beans
335
Gathering the beans
336
Maximix Arrangements
337
Totient Stairstep Sequences
338
Cutting Rectangular Grid Paper
339
Peredur fab Efrawg
340
Crazy Function
341
Golomb's self-describing sequence
342
The totient of a square is a cube
343
Fractional Sequences
344
Silver dollar game
345
Matrix Sum
346
Strong Repunits
347
Largest integer divisible by two primes
348
Sum of a square and a cube
349
Langton's ant
350
Constraining the least greatest and the greatest least