# Problems

1 – 50 of 57
 Problem Title Likes Solvers Difficulty

#### Problem 5. Triangle Numbers

Created by: Cody Team

Tags math, triangle, nice

114

22797

#### Problem 26. Determine if input is odd

Created by: Cody Team

115

21361

#### Problem 6. Select every other element of a vector

Created by: Cody Team

161

27024

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

Created by: Cody Team

64

14486

#### Problem 76. De-dupe

Created by: Cody Team

Tags matlab

11

2409

#### Problem 35. Quote Doubler

Created by: Cody Team

9

2353

#### Problem 41. Cell joiner

Created by: Cody Team

Tags strings, matlab

31

4507

#### Problem 33. Create times-tables

Created by: Cody Team

Tags matrices

92

13576

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

Created by: Cody Team

Tags easy, matrices

43

7927

#### Problem 19. Swap the first and last columns

Created by: Cody Team

89

16558

#### Problem 20. Summing digits

Created by: Cody Team

Tags strings, sum

33

6774

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

Created by: Cody Team

23

5002

#### Problem 12. Fibonacci sequence

Created by: Cody Team

95

11740

#### Problem 32. Most nonzero elements in row

Created by: Cody Team

Tags matrices

37

6617

#### Problem 72. Interpolator

Created by: Cody Team

36

3109

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

Created by: Cody Team

Tags 3n+1, sample

74

7253

#### Problem 10. Determine whether a vector is monotonically increasing

Created by: Cody Team

115

16337

#### Problem 9. Who Has the Most Change?

Created by: Cody Team

74

7980

#### Problem 25. Remove any row in which a NaN appears

Created by: Cody Team

71

7797

#### Problem 22. Remove the vowels

Created by: Cody Team

Tags regexp, siam

23

5504

#### Problem 4. Make a checkerboard matrix

Created by: Cody Team

190

14467

#### Problem 66. Find the two-word state names

Created by: Cody Team

Tags regexp, states

5

1015

#### Problem 62. Elapsed Time

Created by: Cody Team

Tags time

15

2338

#### Problem 42. Find the alphabetic word product

Created by: Cody Team

Tags matlab

10

2806

#### Problem 44. Trimming Spaces

Created by: Cody Team

9

1908

#### Problem 57. Summing Digits within Text

Created by: Cody Team

Tags strings

10

1951

#### Problem 94. Target sorting

Created by: Cody Team

Tags sorting, matlab

26

3952

#### Problem 46. Which doors are open?

Created by: Cody Team

25

2712

#### Problem 77. Clean the List of Names

Created by: Cody Team

Tags strings

3

1274

#### Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

56

4725

#### Problem 37. Pascal's Triangle

Created by: Cody Team

23

3586

#### Problem 27. Pangrams!

Created by: Cody Team

Tags strings

33

3171

#### Problem 23. Finding Perfect Squares

Created by: Cody Team

Tags sets

139

14512

#### Problem 13. Remove all the consonants

Created by: Cody Team

Tags regexp, basics

23

3675

#### Problem 74. Balanced number

Created by: Cody Team

Tags matlab

19

2447

#### Problem 47. Extract leading non-zero digit

Created by: Cody Team

5

1650

#### Problem 48. Making change

Created by: Cody Team

Tags money, subs

15

2799

#### Problem 64. The Goldbach Conjecture, Part 2

Created by: Cody Team

Tags primes

16

1848

#### Problem 92. Find state names that start with the letter N

Created by: Cody Team

Tags regexp, states

5

1000

#### Problem 54. Maximum running product for a string of numbers

Created by: Cody Team

6

1644

#### Problem 45. Make a Palindrome Number

Created by: Cody Team

Tags strings

19

1875

#### Problem 31. Remove all the words that end with "ain"

Created by: Cody Team

18

1764

#### Problem 18. Bullseye Matrix

Created by: Cody Team

Tags matrices

90

5060

#### Problem 29. Nearest Numbers

Created by: Cody Team

39

3872

#### Problem 61. Find state names that end with the letter A

Created by: Cody Team

Tags regexp, states

8

994

#### Problem 83. Prime factor digits

Created by: Cody Team

Tags primes

19

1676

#### Problem 34. Binary numbers

Created by: Cody Team

Tags matlab

42

3483

#### Problem 69. Find the peak 3n+1 sequence value

Created by: Cody Team

Tags 3n+1

16

1691

#### Problem 75. Find the palindrome

Created by: Cody Team

Tags strings

7

1136

#### Problem 36. Find relatively common elements in matrix rows

Created by: Cody Team

Tags matlab

9

1481

1 – 50 of 57