Problems

1 – 50 of 77
 Problem Title Likes Solvers Difficulty

Problem 5. Triangle Numbers

Created by: Cody Team

Tags math, triangle, nice

115

22906

Problem 26. Determine if input is odd

Created by: Cody Team

115

21395

Problem 6. Select every other element of a vector

Created by: Cody Team

161

27158

Problem 17. Find all elements less than 0 or greater than 10 and replace them with NaN

Created by: Cody Team

64

14519

Problem 76. De-dupe

Created by: Cody Team

Tags matlab

11

2432

Problem 35. Quote Doubler

Created by: Cody Team

9

2382

Problem 41. Cell joiner

Created by: Cody Team

Tags strings, matlab

32

4555

Problem 33. Create times-tables

Created by: Cody Team

Tags matrices

92

13683

Problem 14. Find the numeric mean of the prime numbers in a matrix.

Created by: Cody Team

Tags easy, matrices

43

7957

Problem 19. Swap the first and last columns

Created by: Cody Team

89

16681

Problem 20. Summing digits

Created by: Cody Team

Tags strings, sum

33

6800

Problem 30. Sort a list of complex numbers based on far they are from the origin.

Created by: Cody Team

23

5028

Problem 12. Fibonacci sequence

Created by: Cody Team

95

11779

Problem 32. Most nonzero elements in row

Created by: Cody Team

Tags matrices

37

6641

Problem 72. Interpolator

Created by: Cody Team

36

3111

Problem 21. Return the 3n+1 sequence for n

Created by: Cody Team

Tags 3n+1, sample

74

7282

Problem 10. Determine whether a vector is monotonically increasing

Created by: Cody Team

116

16451

Problem 9. Who Has the Most Change?

Created by: Cody Team

74

8009

Problem 22. Remove the vowels

Created by: Cody Team

Tags regexp, siam

23

5530

Problem 25. Remove any row in which a NaN appears

Created by: Cody Team

71

7827

Problem 4. Make a checkerboard matrix

Created by: Cody Team

190

14500

Problem 66. Find the two-word state names

Created by: Cody Team

Tags regexp, states

5

1023

Problem 62. Elapsed Time

Created by: Cody Team

Tags time

15

2365

Problem 40. Reverse Run-Length Encoder

Created by: Cody Team

Tags encoding

16

2111

Problem 39. Which values occur exactly three times?

Created by: Cody Team

Tags search

21

4523

Problem 87. Indexed Probability Table

Created by: Cody Team

Tags matlab

8

1864

Problem 73. Replace NaNs with the number that appears to its left in the row.

Created by: Cody Team

Tags matlab

16

2549

Problem 28. Counting Money

Created by: Cody Team

Tags regexp, strings

15

3040

Problem 44. Trimming Spaces

Created by: Cody Team

9

1935

Problem 57. Summing Digits within Text

Created by: Cody Team

Tags strings

10

1980

Problem 42. Find the alphabetic word product

Created by: Cody Team

Tags matlab

10

2833

Problem 50. QWERTY coordinates

Created by: Cody Team

Tags indexing

18

2007

Problem 94. Target sorting

Created by: Cody Team

Tags sorting, matlab

26

3973

Problem 77. Clean the List of Names

Created by: Cody Team

Tags strings

3

1294

Problem 46. Which doors are open?

Created by: Cody Team

25

2737

Problem 49. Sums with Excluded Digits

Created by: Cody Team

Tags strings

13

1750

Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

56

4747

Problem 37. Pascal's Triangle

Created by: Cody Team

23

3613

Problem 13. Remove all the consonants

Created by: Cody Team

Tags regexp, basics

23

3687

Problem 23. Finding Perfect Squares

Created by: Cody Team

Tags sets

139

14618

Problem 27. Pangrams!

Created by: Cody Team

Tags strings

33

3197

Problem 16. Return the largest number that is adjacent to a zero

Created by: Cody Team

Tags vectors

25

4610

Problem 53. Duplicates

Created by: Cody Team

5

1784

Problem 80. Test for balanced parentheses

Created by: Cody Team

Tags regexp, parens

9

1068

Problem 74. Balanced number

Created by: Cody Team

Tags matlab

19

2469

Problem 51. Find the two most distant points

Created by: Cody Team

Tags distance

8

2262

Problem 47. Extract leading non-zero digit

Created by: Cody Team

5

1676

Problem 48. Making change

Created by: Cody Team

Tags money, subs

15

2825

Problem 85. Remove the polynomials that have positive real elements of their roots.

Created by: Cody Team

Tags matlab

3

1187

Problem 64. The Goldbach Conjecture, Part 2

Created by: Cody Team

Tags primes

16

1871

1 – 50 of 77