Benjamin Richards

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1 – 50 of 194

Problem 1215. Diophantine Equations (Inspired by Project Euler, problem 66)

Created by: James

Tags projecteuler, diophantine, pell equation

7

Solutions

229

Size

7

Solutions

229

Size

Problem 2383. Kepler's Equation

Created by: Z

Tags space, orbit mechanics, kepler

2

Solutions

27

Size

2

Solutions

27

Size

Problem 656. Calculate Euler's phi function

Created by: Freddy

Tags math, basic matlab, factors

1

Solution

77

Size

1

Solution

77

Size

Problem 1475. Chebyshev polynomials of the 2nd Kind

Created by: Yaroslav

Tags polynomial

1

Solution

54

Size

1

Solution

54

Size

Problem 1474. Chebyshev polynomials of the 1st Kind

Created by: Yaroslav

Tags polynomial

3

Solutions

83

Size

3

Solutions

83

Size

Problem 1476. Radial Zernike polynomials

Created by: Yaroslav

Tags polynomial

1

Solution

82

Size

1

Solution

82

Size

Problem 1304. Hermite Polynomials

Created by: Yaroslav

Tags polynomial

1

Solution

73

Size

1

Solution

73

Size

Problem 1473. Legendre polynomials

Created by: Yaroslav

Tags polynomial

1

Solution

75

Size

1

Solution

75

Size

Problem 1465. Generalized Laguerre polynomials

Created by: Yaroslav

Tags polynomial

1

Solution

50

Size

1

Solution

50

Size

Problem 1464. Laguerre polynomials

Created by: Yaroslav

Tags polynomial

1

Solution

45

Size

1

Solution

45

Size

Problem 566. Sum of first n terms of a harmonic progression

Created by: Srivardhini

Tags sequences, series, poor_test_suite

2

Solutions

36

Size

2

Solutions

36

Size

Problem 191. Proper Factors

Created by: @bmtran (Bryant Tran)

Tags proper factors

9

Solutions

135

Size

9

Solutions

135

Size

Problem 365. Numbers with prime factors 2, 3 and 5.

Created by: elias GR

Tags primes, factors

1

Solution

80

Size

1

Solution

80

Size

Problem 2674. Generalised Hamming Number

Created by: Jean-Marie Sainthillier

Tags hamming

1

Solution

84

Size

1

Solution

84

Size

Problem 2593. Polite numbers. N-th polite number.

Created by: Jan Orwat

Tags number theory, a138591

4

Solutions

26

Size

4

Solutions

26

Size

Problem 2734. N-th Odious

Created by: Jan Orwat

Tags number theory, oeis, pop series

2

Solutions

55

Size

2

Solutions

55

Size

Problem 1826. Find vampire numbers

Created by: Andrew Newell

Tags factors, number theory

3

Solutions

379

Size

3

Solutions

379

Size

Problem 1472. nth Rational Number

Created by: G K

Tags math

4

Solutions

63

Size

4

Solutions

63

Size

Problem 1471. Index of a Rational number

Created by: G K

Tags math

1

Solution

20

Size

1

Solution

20

Size

Problem 2056. Is this number Munchhausen?

Created by: Ted

Tags math, narcissistic number, munchhausen

7

Solutions

68

Size

7

Solutions

68

Size

Problem 2061. Narcissistic number ?

Created by: Jean-Marie Sainthillier

Tags narcissistic

3

Solutions

26

Size

3

Solutions

26

Size

Problem 2690. Armstrong Number

Created by: VIVEK RUHELA

Tags arithmetic, basic matlab

2

Solutions

26

Size

2

Solutions

26

Size

Problem 1925. Smith numbers

Created by: Sky Sartorius

Tags sum, factors

2

Solutions

70

Size

2

Solutions

70

Size

Problem 2819. Find the 9's Complement

Created by: Pritesh Shah

Tags matlab

1

Solution

30

Size

1

Solution

30

Size

Problem 2595. Polite numbers. Politeness.

Created by: Jan Orwat

Tags number theory, oeis

7

Solutions

45

Size

7

Solutions

45

Size

Problem 1771. Polygonal numbers

Created by: Jan Orwat

Tags number theory, sequence, polygonal

3

Solutions

75

Size

3

Solutions

75

Size

Problem 2248. Bell Number calculator

Created by: robin

Tags sets, partition

1

Solution

94

Size

1

Solution

94

Size

Problem 1997. Compute Fibonacci Number

Created by: Alex

Tags numbers, fibonacci

1

Solution

41

Size

1

Solution

41

Size

Problem 166. Kaprekar numbers

Created by: the cyclist

Tags kaprekar

2

Solutions

74

Size

2

Solutions

74

Size

Problem 139. Determine if a Given Number is a Triangle Number

Created by: @bmtran (Bryant Tran)

Tags triangle numbers

2

Solutions

60

Size

2

Solutions

60

Size

Problem 2733. Evil Number

Created by: Jan Orwat

Tags easy, number theory, oeis

6

Solutions

20

Size

6

Solutions

20

Size

Problem 156. Parasitic numbers

Created by: the cyclist

Tags parasitic

1

Solution

51

Size

1

Solution

51

Size

Problem 44314. A Simple Tide Gauge with MATLAB

Created by: AMITAVA BISWAS

Tags ocean, prediction, regression

2

Solutions

15

Size

2

Solutions

15

Size

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

Created by: James

Tags time, cody5

1

Solution

10

Size

1

Solution

10

Size

Problem 369. Basic electricity in a dry situation

Created by: AMITAVA BISWAS

Tags physics, current, cody5

6

Solutions

15

Size

6

Solutions

15

Size

Problem 361. Energy of a photon

Created by: AMITAVA BISWAS

Tags physics, frequency, energy

5

Solutions

17

Size

5

Solutions

17

Size

Problem 44342. Spot the First Occurrence of 5

Created by: Peng Liu

Tags cody5

3

Solutions

82

Size

3

Solutions

82

Size

Problem 44306. Is it really a 5?

Created by: goc3

Tags regexp, string, number

12

Solutions

186

Size

12

Solutions

186

Size

Problem 44352. The Top 5 Primes

Created by: Peng Liu

Tags cody5

1

Solution

129

Size

1

Solution

129

Size

Problem 44334. Sums of Multiple Pairs of Triangular Numbers

Created by: James

Tags triangular numbers, cody5

2

Solutions

103

Size

2

Solutions

103

Size

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

Created by: Mehmet OZC

Tags number theory, cody5

1

Solution

57

Size

1

Solution

57

Size

Problem 44309. Pi Digit Probability

Created by: Mehmet OZC

Tags pi, string manipulation, histogram

6

Solutions

32

Size

6

Solutions

32

Size

Problem 44305. 5 Prime Numbers

Created by: goc3

Tags prime, primes, string

2

Solutions

55

Size

2

Solutions

55

Size

Problem 44358. I Plead the Fifth

Created by: goc3

Tags regexp, strings, string

3

Solutions

41

Size

3

Solutions

41

Size

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

Created by: Mehmet OZC

Tags integer sequence, cody5, van eck's sequence

1

Solution

87

Size

1

Solution

87

Size

Problem 44339. Recaman Sequence - II

Created by: Mehmet OZC

Tags integer sequence, cody5, recaman sequence

1

Solution

110

Size

1

Solution

110

Size

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

Created by: AMITAVA BISWAS

Tags random, probability, decay

3

Solutions

18

Size

3

Solutions

18

Size

Problem 44338. Recaman Sequence - I

Created by: Mehmet OZC

Tags integer sequence, cody5

2

Solutions

85

Size

2

Solutions

85

Size

Problem 44360. Pentagonal Numbers

Created by: goc3

Tags series, number, sequence

1

Solution

58

Size

1

Solution

58

Size

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

Created by: Doug Hull

Tags cody5, noughts and crosses

2

Solutions

51

Size

2

Solutions

51

Size

1 – 50 of 194