Lincoln Poon

10

Rank

83

Badges

45419

Score

View Community Profile

1 – 50 of 3,729

Problem 53990. Classify product/digit-sum sequences

Created by: ChrisR

Tags number theory, sequence, noeis

2

Solutions

146

Size

2

Solutions

146

Size

Problem 53910. List the dopey numbers

Created by: ChrisR

Tags binary, number theory

1

Solution

77

Size

1

Solution

77

Size

Problem 54345. Fill a rectangle with 1x1 and 2x2 tiles

Created by: ChrisR

Tags tiles, sequence

1

Solution

44

Size

1

Solution

44

Size

Problem 57447. Compute a nested cube root

Created by: ChrisR

Tags algebra, limit, michael penn

1

Solution

25

Size

1

Solution

25

Size

Problem 2337. Sum of big primes without primes

Created by: Jean-Marie Sainthillier

Tags primes, project euler, eratosthenes

5

Solutions

84

Size

5

Solutions

84

Size

Problem 50. QWERTY coordinates

Created by: Cody Team

Tags indexing

4

Solutions

29

Size

4

Solutions

29

Size

Problem 54660. Generate the Figure-Figure sequence

Created by: ChrisR

Tags sequence, figure/ground, hofstadter

1

Solution

55

Size

1

Solution

55

Size

Problem 56743. Count the unitary divisors of a number

Created by: ChrisR

Tags number theory, sequence

1

Solution

54

Size

1

Solution

54

Size

Problem 56738. List unitary divisors of a number

Created by: ChrisR

Tags number theory

1

Solution

52

Size

1

Solution

52

Size

Problem 46087. Investigate the frequency of last non-zero digits of primorials

Created by: ChrisR

Tags primes, number theory, primorial

1

Solution

662

Size

1

Solution

662

Size

Problem 48075. Play PRIMEGAME

Created by: ChrisR

Tags primes, sequence, conway

4

Solutions

137

Size

4

Solutions

137

Size

Problem 46594. Create a sequence of primes p such that p > n π(p)

Created by: ChrisR

Tags primes, sequence

1

Solution

67

Size

1

Solution

67

Size

Problem 56200. Triangle Coordinates

Created by: Ben Placek

Tags math, matrix creation

1

Solution

50

Size

1

Solution

50

Size

Problem 56185. Extract the Acrostic Message

Created by: Ben Placek

Tags string, cipher, text

1

Solution

31

Size

1

Solution

31

Size

Problem 56180. Boustrophedon

Created by: Ben Placek

Tags matrix manipulation

1

Solution

51

Size

1

Solution

51

Size

Problem 55260. Create block matrix of integers (j+k-1) - Part II

Created by: Matt Tearle

Tags matrix, blocks

1

Solution

65

Size

1

Solution

65

Size

Problem 55255. Create block matrix of integers (j+k-1) - Part I

Created by: Matt Tearle

Tags matrix, blocks

1

Solution

54

Size

1

Solution

54

Size

Problem 56175. Dartboard Average II

Created by: Matt Tearle

Tags math, mean, dartboard

1

Solution

81

Size

1

Solution

81

Size

Problem 56195. Possible Rugby Scores

Created by: Matt Tearle

Tags math, rugby, linear combinations

2

Solutions

108

Size

2

Solutions

108

Size

Problem 56288. Angle Between Analog Clock Hands

Created by: Matt Tearle

Tags math, geometry

3

Solutions

127

Size

3

Solutions

127

Size

Problem 56373. Snow Accumulation and Structural Risks To Residential Properties

Created by: Meg Noah

Tags weather

1

Solution

47

Size

1

Solution

47

Size

Problem 45244. How many Christmas presents under the tree?

Created by: Miles Walker

Tags christmas, trivia

1

Solution

32

Size

1

Solution

32

Size

Problem 56348. Calculate the Distance to Source of Lightning

Created by: Meg Noah

Tags weather

1

Solution

12

Size

1

Solution

12

Size

Problem 59616. Remove a specific column with min value

Created by: Zaid Al-Dailami

Tags indexing, find

1

Solution

41

Size

1

Solution

41

Size

Problem 59611. Remove a specific column with max value

Created by: Zaid Al-Dailami

Tags indexing, find

1

Solution

41

Size

1

Solution

41

Size

Problem 59606. Remove a specific row with min value

Created by: Zaid Al-Dailami

Tags indexing, find

2

Solutions

47

Size

2

Solutions

47

Size

Problem 59601. Remove a specific row with max value

Created by: Zaid Al-Dailami

Tags find

1

Solution

41

Size

1

Solution

41

Size

Problem 59566. Find Rows with Specift Properities

Created by: Zaid Al-Dailami

Tags find

1

Solution

64

Size

1

Solution

64

Size

Problem 59626. Swap between columns

Created by: Zaid Al-Dailami

Tags matrix, basic matlab, basics

1

Solution

36

Size

1

Solution

36

Size

Problem 59646. Remove a specific character with another

Created by: Zaid Al-Dailami

Tags basic matlab, basics

1

Solution

14

Size

1

Solution

14

Size

Problem 59641. Swap between first and last

Created by: Zaid Al-Dailami

Tags matrix, basic matlab, basics

1

Solution

32

Size

1

Solution

32

Size

Problem 59636. Swap between first and last column

Created by: Zaid Al-Dailami

Tags matrix, basic matlab, basics

1

Solution

32

Size

1

Solution

32

Size

Problem 59631. Swap between rows

Created by: Zaid Al-Dailami

Tags matrix, basic matlab, basics

1

Solution

36

Size

1

Solution

36

Size

Problem 53114. Flip the diagonal values

Created by: Syed Haider M. Rizvi

Tags matrix manipulation, matrix

1

Solution

80

Size

1

Solution

80

Size

Problem 45220. Find triangles from edge

Created by: Nicolas Douillet

Tags find, geometry, triangle

1

Solution

77

Size

1

Solution

77

Size

Problem 2778. Rule of mixtures (composites) - lower and upper bounds (volumes)

Created by: goc3

Tags matrix, materials, composites

2

Solutions

63

Size

2

Solutions

63

Size

Problem 56358. Calculate Wind Chill Factor

Created by: Meg Noah

Tags weather

2

Solutions

33

Size

2

Solutions

33

Size

Problem 56260. Leonardo primes

Created by: Lenka Hanakova

Tags sequences, primes

1

Solution

46

Size

1

Solution

46

Size

Problem 55965. Where the Four Corners Am I? (Vectorized)

Created by: Ben Placek

Tags programming constructs

1

Solution

122

Size

1

Solution

122

Size

Problem 53960. Wordle

Created by: Franco Zapata

Tags string, word, wordle

2

Solutions

87

Size

2

Solutions

87

Size

Problem 50933. Find pairs of primes with the same digit sum

Created by: ChrisR

Tags primes, digit sum

1

Solution

100

Size

1

Solution

100

Size

Problem 46551. Solve a ballot counting problem

Created by: ChrisR

Tags combinatorics

1

Solution

30

Size

1

Solution

30

Size

Problem 56323. Air Mass to Star for an Observer at Mean Sea Level

Created by: Meg Noah

Tags weather

1

Solution

16

Size

1

Solution

16

Size

Problem 42853. Fifteen Parity Check

Created by: Richard Zapor

Tags bug, mod, fifteen

3

Solutions

115

Size

3

Solutions

115

Size

Problem 832. Convert single-precision floating-point number to binary representation

Created by: Vitaly Lavrukhin

Tags binary, convert, single

2

Solutions

138

Size

2

Solutions

138

Size

Problem 44764. Lights Out 10 - 5x5, with wrapping, 6 moves

Created by: goc3

Tags game, logic, flip

1

Solution

157

Size

1

Solution

157

Size

Problem 44753. Lights Out 3 - 5x5, 6 moves

Created by: goc3

Tags game, logic, flip

1

Solution

151

Size

1

Solution

151

Size

Problem 44752. Lights Out 2 - 5x5, 4 moves

Created by: goc3

Tags game, logic, flip

1

Solution

151

Size

1

Solution

151

Size

Problem 44751. Lights Out 1 - 5x5, 3 moves

Created by: goc3

Tags game, logic, flip

1

Solution

151

Size

1

Solution

151

Size

Problem 52125. Compute the sum of reciprocals of quadratics

Created by: ChrisR

Tags sum, special functions, analytical

4

Solutions

49

Size

4

Solutions

49

Size

1 – 50 of 3,729