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Problems


IDDescription / Title
251
Cardano Triplets
252
Convex Holes
253
Tidying up
254
Sums of Digit Factorials
255
Rounded Square Roots
256
Tatami-Free Rooms
257
Angular Bisectors
258
A lagged Fibonacci sequence
259
Reachable Numbers
260
Stone Game
261
Pivotal Square Sums
262
Mountain Range
263
An engineers' dream come true
264
Triangle Centres
265
Binary Circles
266
Pseudo Square Root
267
Billionaire
268
Counting numbers with at least four distinct prime factors less than 100
269
Polynomials with at least one integer root
270
Cutting Squares
271
Modular Cubes, part 1
272
Modular Cubes, part 2
273
Sum of Squares
274
Divisibility Multipliers
275
Balanced Sculptures
276
Primitive Triangles
277
A Modified Collatz sequence
278
Linear Combinations of Semiprimes
279
Triangles with integral sides and an integral angle
280
Ant and seeds
281
Pizza Toppings
282
The Ackermann function
283
Integer sided triangles for which the area/perimeter ratio is integral
284
Steady Squares
285
Pythagorean odds
286
Scoring probabilities
287
Quadtree encoding (a simple compression algorithm)
288
An enormous factorial
289
Eulerian Cycles
290
Digital Signature
291
Panaitopol Primes
292
Pythagorean Polygons
293
Pseudo-Fortunate Numbers
294
Sum of digits - experience #23
295
Lenticular holes
296
Angular Bisector and Tangent
297
Zeckendorf Representation
298
Selective Amnesia
299
Three similar triangles
300
Protein folding