Problems

1 – 50 of 55

Problem Title Likes Solvers

Problem 564. How to subtract?

Created by: AMITAVA BISWAS

Tags addition, cody5, X-Y

1425

Problem 361. Energy of a photon

Created by: AMITAVA BISWAS

Tags physics, frequency, energy

1144

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

Created by: James

Tags time, cody5

762

Problem 2736. Pernicious Anniversary Problem

Created by: Jan Orwat

Tags easy, sequences, oeis

735

Problem 44311. Number of Even Elements in Fibonacci Sequence

Created by: Mehmet OZC

Tags fibonacci, cody5, big number

667

Problem 44385. Extra safe primes

Created by: Matthew Eicholtz

Tags prime numbers, cody5, safe prime

664

Problem 44360. Pentagonal Numbers

Created by: goc3

Tags series, number, sequence

569

Problem 44384. Find the nearest prime number

Created by: Matthew Eicholtz

Tags prime numbers, cody5

556

Problem 44344. The 5th Root

Created by: goc3

Tags root, power, cody5

519

Problem 369. Basic electricity in a dry situation

Created by: AMITAVA BISWAS

Tags physics, current, cody5

488

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

Created by: Doug Hull

Tags cody5, noughts and crosses

438

Problem 44305. 5 Prime Numbers

Created by: goc3

Tags prime, primes, string

393

Problem 44370. Octoberfest festival

Created by: Andriy Kavetsky

Tags fibonacci, cody5

390

Problem 44342. Spot the First Occurrence of 5

Created by: Peng Liu

Tags cody5

365

Problem 44358. I Plead the Fifth

Created by: goc3

Tags regexp, strings, string

344

Problem 44314. A Simple Tide Gauge with MATLAB

Created by: AMITAVA BISWAS

Tags ocean, prediction, regression

342

Problem 44309. Pi Digit Probability

Created by: Mehmet OZC

Tags pi, string manipulation, histogram

321

Problem 44375. Missing five

Created by: Alfonso Nieto-Castanon

Tags cody5

291

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

Created by: Mehmet OZC

Tags integer sequence, cody5, van eck's sequence

291

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

Created by: Mehmet OZC

Tags number theory, cody5

281

Problem 44306. Is it really a 5?

Created by: goc3

Tags regexp, string, number

279

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

Created by: AMITAVA BISWAS

Tags random, probability, decay

277

Problem 44369. Circle/Pentagon Overlap

Created by: goc3

Tags geometry, circle, radius

274

Problem 44338. Recaman Sequence - I

Created by: Mehmet OZC

Tags integer sequence, cody5

261

Problem 44352. The Top 5 Primes

Created by: Peng Liu

Tags cody5

251

Problem 44368. Inscribed Pentagon?

Created by: goc3

Tags geometry, circle, radius

251

Problem 44339. Recaman Sequence - II

Created by: Mehmet OZC

Tags integer sequence, cody5, recaman sequence

232

Problem 44372. Polarisation

Created by: Jan Orwat

Tags cody5, quantum, angles

229

Problem 44307. The glass half full

Created by: HH

Tags contest, cody5

229

Problem 281. Acid and water

Created by: AMITAVA BISWAS

Tags cody5, exponential decay, fluid mixture

229

Problem 44350. Breaking Out of the Matrix

Created by: James

Tags cody5, whoa, windowing

227

Problem 44345. MATLAB Counter

Created by: Peng Liu

Tags cody5, nested function

217

Problem 44334. Sums of Multiple Pairs of Triangular Numbers

Created by: James

Tags triangular numbers, cody5

203

Problem 44380. ASCII Birthday Cake

Created by: @bmtran (Bryant Tran)

Tags art, birthday, ascii

196

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

Created by: Peng Liu

Tags multiplication, string, cody5

194

Problem 44359. 5th Time's a Charm

Created by: goc3

Tags approximation, cody5, five

174

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

Created by: Doug Hull

Tags cody5

100

Problem 44365. An asteroid and a spacecraft

Created by: AMITAVA BISWAS

Tags projectile, mechanics, cody5

145

Problem 44337. Sums of Distinct Powers

Created by: James

Tags binary, cody5, distinct powers

133

Problem 44310. Digit concentration in Champernowne's constant

Created by: Mehmet OZC

Tags cody5, champernowne's constant, big number

113

Problem 44341. Hexagonal numbers on a spiral matrix

Created by: Mehmet OZC

Tags big integer, cody5, hexagonal numbers

Problem 44381. Cache me Outside

Created by: @bmtran (Bryant Tran)

Tags cody5, memoize

Problem 44347. Ned's queens

Created by: HH

Tags contest, cody5

Problem 44343. Pair Primes

Created by: Mehmet OZC

Tags integers, prime numbers, cody5

Problem 44382. Parse me a Lisp

Created by: @bmtran (Bryant Tran)

Tags lisp, parse, cody5

Problem 44367. Inscribed Pentagon? 2

Created by: goc3

Tags geometry, circle, radius

Problem 44340. Recaman Sequence - III

Created by: Mehmet OZC

Tags cody5, recaman sequence

Problem 44353. Group-wise Euclidean distance

Created by: Peng Liu

Tags speed, cody5

Problem 44378. Five-dimensional maze

Created by: @bmtran (Bryant Tran)

Tags maze, graph theory, multidimensional

Problem 44386. Circumscribed Pentagon?

Created by: goc3

Tags geometry, circle, circumscribe

1 – 50 of 55

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Problems

Problem Groups