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51 – 100 of 1,969

Problem 60734. Conditional transpose

Created by: Christian Schröder

Tags vector, transpose, restricted

1

Solution

14

Size

1

Solution

14

Size

Problem 60733. Find the closest geyser prime

Created by: ChrisR

Tags primes, sequence, anniversary

1

Solution

57

Size

1

Solution

57

Size

Problem 60727. Remove the diagonal of a square matrix

Created by: ChrisR

Tags matrix manipulation, diagonal

3

Solutions

25

Size

3

Solutions

25

Size

Problem 60633. Sum the reciprocals of polygonal numbers

Created by: ChrisR

Tags special functions, partial fractions

1

Solution

33

Size

1

Solution

33

Size

Problem 60613. Complete a 2nd order difference sequence

Created by: CXD

Tags sequence, difference

1

Solution

30

Size

1

Solution

30

Size

Problem 60506. Pronounce digits

Created by: minnolina

Tags easy

1

Solution

35

Size

1

Solution

35

Size

Problem 60476. Remove Adjacent Pairs

Created by: minnolina

Tags easy

1

Solution

35

Size

1

Solution

35

Size

Problem 60581. List primes of the form xy+z

Created by: ChrisR

Tags primes, number theory, sequence

1

Solution

53

Size

1

Solution

53

Size

Problem 60576. Perimeter of a Koch snowflake

Created by: Natalie

Tags geometry, sum, fractal

1

Solution

33

Size

1

Solution

33

Size

Problem 60571. Find polygonal numbers that are Blum integers

Created by: ChrisR

Tags number theory, sequence, semiprime

1

Solution

63

Size

1

Solution

63

Size

Problem 60561. Determine whether a number is a Blum integer

Created by: ChrisR

Tags primes, number theory, sequence

2

Solutions

31

Size

2

Solutions

31

Size

Problem 60536. Jigsaw 001: Intro 2x2 square. Pieces 128x128

Created by: Richard Zapor

Tags urlwrite, puzzle, imread

2

Solutions

90

Size

2

Solutions

90

Size

Problem 60516. Compute the totient summatory function

Created by: ChrisR

Tags number theory, sequence

1

Solution

45

Size

1

Solution

45

Size

Problem 60541. Compute the number of squares a knight can reach after n moves

Created by: ChrisR

Tags chess, sequence, recurrence

1

Solution

30

Size

1

Solution

30

Size

Problem 60486. Compute Farey sequences

Created by: ChrisR

Tags fractions, sequence, mediant

1

Solution

58

Size

1

Solution

58

Size

Problem 60416. Secret Message and Acrostic

Created by: minnolina

Tags easy, string, acrostic

1

Solution

13

Size

1

Solution

13

Size

Problem 60426. Reversing Maximal Ascending Subsequences

Created by: minnolina

Tags easy, sorting

1

Solution

46

Size

1

Solution

46

Size

Problem 60421. Largest Rectangle Area in a Histogram

Created by: minnolina

Tags easy, rectangle, histogram

1

Solution

39

Size

1

Solution

39

Size

Problem 60431. Calculating the Union Area of Overlapping Rectangles

Created by: minnolina

Tags rectangle, union

2

Solutions

65

Size

2

Solutions

65

Size

Problem 42938. Project Euler: Problem 18, Maximum path sum I

Created by: Riam Su

Tags projecteuler, euler

1

Solution

38

Size

1

Solution

38

Size

Problem 60406. Alert a city about a spill

Created by: ChrisR

Tags datetime, river mixing, fzero

1

Solution

126

Size

1

Solution

126

Size

Problem 1071. Next Lower Power of B

Created by: @bmtran (Bryant Tran)

Tags plus15, nextpow2

1

Solution

17

Size

1

Solution

17

Size

Problem 60411. Compute a sequence with the whyphi sieve

Created by: ChrisR

Tags sequence, sieve, triangular

1

Solution

49

Size

1

Solution

49

Size

Problem 60331. Compute the area of a Q

Created by: ChrisR

Tags geometry, numberphile, quadrature

1

Solution

20

Size

1

Solution

20

Size

Problem 60351. List the smallest numbers with n distinct prime factors

Created by: ChrisR

Tags sequence, 46054, 46057

1

Solution

41

Size

1

Solution

41

Size

Problem 60401. Find primes and integers that solve an equation

Created by: ChrisR

Tags number theory, wilsons theorem, j pi maths

1

Solution

53

Size

1

Solution

53

Size

Problem 60336. Determine whether a property description closes

Created by: ChrisR

Tags geometry, trigonometry, surveying

1

Solution

108

Size

1

Solution

108

Size

Problem 60346. Classify numbers as abundant, deficient, or perfect

Created by: ChrisR

Tags number theory, sequence

1

Solution

56

Size

1

Solution

56

Size

Problem 60341. Family Savings Analysis

Created by: minnolina

Tags cell array, bank

1

Solution

69

Size

1

Solution

69

Size

Problem 60286. Hofstadter Q sequence

Created by: minnolina

Tags sequence, hofstadter

1

Solution

47

Size

1

Solution

47

Size

Problem 60311. Travel a path

Created by: ChrisR

Tags strings, trigonometry, movement

1

Solution

49

Size

1

Solution

49

Size

Problem 60306. Add non-triangular numbers

Created by: ChrisR

Tags sum, algebra, sequence

1

Solution

13

Size

1

Solution

13

Size

Problem 60301. Compute the area of a lune

Created by: ChrisR

Tags geometry, trigonometry, circles

1

Solution

73

Size

1

Solution

73

Size

Problem 60296. Maximizing Stock Profit

Created by: minnolina

Tags easy

1

Solution

17

Size

1

Solution

17

Size

Problem 60291. Minimize a quadratic function

Created by: ChrisR

Tags minimization, dr barker

1

Solution

80

Size

1

Solution

80

Size

Problem 60276. Hofstadter H sequence

Created by: minnolina

Tags sequence, hofstadter

1

Solution

41

Size

1

Solution

41

Size

Problem 60271. Hofstadter G sequence

Created by: minnolina

Tags sequence, hofstadter

1

Solution

21

Size

1

Solution

21

Size

Problem 60266. Stern-Brocot Sequence

Created by: minnolina

Tags sequence, stern, brocot

1

Solution

44

Size

1

Solution

44

Size

Problem 60261. Interval Compression

Created by: minnolina

Tags easy, compression

1

Solution

32

Size

1

Solution

32

Size

Problem 60256. Final Stone Weight

Created by: minnolina

Tags easy

1

Solution

37

Size

1

Solution

37

Size

Problem 60251. Instructions Following

Created by: minnolina

Tags easy

1

Solution

19

Size

1

Solution

19

Size

Problem 60206. Find Next Strictly Greater Element

Created by: minnolina

Tags easy

1

Solution

53

Size

1

Solution

53

Size

Problem 60176. Find the number of diagonals in a n sided polygon.

Created by: Sahil Islam

Tags polygon, diagonal

1

Solution

13

Size

1

Solution

13

Size

Problem 60237. Finding the Most Frequent Letter in a Text

Created by: minnolina

Tags char

1

Solution

23

Size

1

Solution

23

Size

Problem 60232. Spreadsheet Column Number

Created by: minnolina

Tags easy

1

Solution

13

Size

1

Solution

13

Size

Problem 60181. Integer Persistence, Product

Created by: minnolina

Tags easy

1

Solution

26

Size

1

Solution

26

Size

Problem 60216. Perfect shuffle

Created by: minnolina

Tags card game, shuffle

1

Solution

17

Size

1

Solution

17

Size

Problem 60211. Find the triplet

Created by: minnolina

Tags easy

1

Solution

44

Size

1

Solution

44

Size

Problem 60221. Battery Charge Indicator

Created by: minnolina

Tags easy

2

Solutions

22

Size

2

Solutions

22

Size

Problem 60201. Find the largest sum of any contiguous subarray

Created by: minnolina

Tags easy, kadane

1

Solution

37

Size

1

Solution

37

Size

51 – 100 of 1,969