Problems

1 – 50 of 56

Problem Title Likes Solvers

Problem 564. How to subtract?

Created by: AMITAVA BISWAS

Tags cody5, X-Y, _x-y)

1350

Problem 361. Energy of a photon

Created by: AMITAVA BISWAS

Tags physics, quantum, charge

977

Problem 2736. Pernicious Anniversary Problem

Created by: Jan Orwat

Tags oeis, sequences, cody5

698

Problem 44349. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.

Created by: James

Tags cody5, time

643

Problem 44385. Extra safe primes

Created by: Matthew Eicholtz

Tags prime numbers, safe prime, cody5

632

Problem 44360. Pentagonal Numbers

Created by: goc3

Tags five, pentagon, pentagonal

524

Problem 44384. Find the nearest prime number

Created by: Matthew Eicholtz

Tags prime numbers, cody5

514

Problem 44344. The 5th Root

Created by: goc3

Tags power, root, five

488

Problem 44311. Number of Even Elements in Fibonacci Sequence

Created by: Mehmet OZC

Tags fibonacci, big number, even number

478

Problem 369. Basic electricity in a dry situation

Created by: AMITAVA BISWAS

Tags shock, physics, current

463

Problem 44363. Is this is a Tic Tac Toe X Win?

Created by: Doug Hull

Tags cody5, noughts and crosses

391

Problem 44305. 5 Prime Numbers

Created by: goc3

Tags five, prime, primes

373

Problem 44370. Octoberfest festival

Created by: Andriy Kavetsky

Tags fibonacci, cody5

345

Problem 44342. Spot the First Occurrence of 5

Created by: Peng Liu

Tags cody5

323

Problem 44314. A Simple Tide Gauge with MATLAB

Created by: AMITAVA BISWAS

Tags tide, ebb, earth

315

Problem 44358. I Plead the Fifth

Created by: goc3

Tags five, string, strings

296

Problem 44321. Van Eck's Sequence's nth member

Created by: Mehmet OZC

Tags integer sequence, van eck's sequence, cody5

277

Problem 44375. Missing five

Created by: Alfonso Nieto-Castanon

Tags cody5

270

Problem 44306. Is it really a 5?

Created by: goc3

Tags five, number, string

265

Problem 44319. Write c^3 as sum of two squares a^2+b^2

Created by: Mehmet OZC

Tags number theory, cody5

261

Problem 44315. Predicting life and death of a memory-less light bulb

Created by: AMITAVA BISWAS

Tags memory-less, probability, stochastic

258

Problem 44338. Recaman Sequence - I

Created by: Mehmet OZC

Tags integer sequence, cody5

247

Problem 44369. Circle/Pentagon Overlap

Created by: goc3

Tags five, pentagon, circle

246

Problem 44309. Pi Digit Probability

Created by: Mehmet OZC

Tags pi, string manipulation, histogram

240

Problem 44368. Inscribed Pentagon?

Created by: goc3

Tags five, pentagon, inscribed

225

Problem 44339. Recaman Sequence - II

Created by: Mehmet OZC

Tags recaman sequence, integer sequence, cody5

216

Problem 44307. The glass half full

Created by: HH

Tags cody5, contest

216

Problem 281. Acid and water

Created by: AMITAVA BISWAS

Tags exponential decay, fluid mixture, cody5

216

Problem 44352. The Top 5 Primes

Created by: Peng Liu

Tags cody5

216

Problem 44372. Polarisation

Created by: Jan Orwat

Tags quantum, angles, cody5

205

Problem 44345. MATLAB Counter

Created by: Peng Liu

Tags cody5, nested function

203

Problem 44313. "Cody" * 5 == "CodyCodyCodyCodyCody"

Created by: Peng Liu

Tags cody5, string, multiplication

193

Problem 44334. Sums of Multiple Pairs of Triangular Numbers

Created by: James

Tags cody5, triangular numbers

191

Problem 44350. Breaking Out of the Matrix

Created by: James

Tags whoa, cody5, windowing

189

Problem 44380. ASCII Birthday Cake

Created by: @bmtran (Bryant Tran)

Tags cody5, birthday, cake

182

Problem 44359. 5th Time's a Charm

Created by: goc3

Tags five, charm, fail

159

Problem 44365. An asteroid and a spacecraft

Created by: AMITAVA BISWAS

Tags star war, spacecraft, projectile

135

Problem 44337. Sums of Distinct Powers

Created by: James

Tags distinct powers, cody5, binary

126

Problem 44310. Digit concentration in Champernowne's constant

Created by: Mehmet OZC

Tags champernowne's constant, big number, cody5

105

Problem 44364. Is this a valid Tic Tac Toe State?

Created by: Doug Hull

Tags cody5

Problem 44381. Cache me Outside

Created by: @bmtran (Bryant Tran)

Tags cody5, memoize

Problem 44341. Hexagonal numbers on a spiral matrix

Created by: Mehmet OZC

Tags hexagonal numbers, spiral matrix, big integer

Problem 44340. Recaman Sequence - III

Created by: Mehmet OZC

Tags recaman sequence, cody5

Problem 44343. Pair Primes

Created by: Mehmet OZC

Tags prime numbers, integers, cody5

Problem 44367. Inscribed Pentagon? 2

Created by: goc3

Tags five, pentagon, inscribed

Problem 44382. Parse me a Lisp

Created by: @bmtran (Bryant Tran)

Tags cody5, lisp, parse

Problem 44353. Group-wise Euclidean distance

Created by: Peng Liu

Tags cody5, speed

Problem 44386. Circumscribed Pentagon?

Created by: goc3

Tags five, pentagon, inscribed

Problem 44347. Ned's queens

Created by: HH

Tags cody5, contest

Problem 44379. One track five lanes

Created by: Alfonso Nieto-Castanon

Tags cody5

1 – 50 of 56

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Problems

Problem Groups