# Problems

1 – 50 of 75
 Problem Title Likes Solvers Difficulty

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

Created by: Cody Team

117

21732

#### Problem 5. Triangle Numbers

Created by: Cody Team

Tags math, triangle, nice

122

24165

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

Created by: Cody Team

167

28870

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

Created by: Cody Team

66

14874

#### Problem 76. De-dupe

Created by: Cody Team

Tags matlab

13

2669

#### Problem 35. Quote Doubler

Created by: Cody Team

9

2592

#### Problem 41. Cell joiner

Created by: Cody Team

Tags strings, matlab

36

5062

#### Problem 33. Create times-tables

Created by: Cody Team

Tags matrices

101

14696

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

Created by: Cody Team

Tags easy, matrices

44

8259

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

Created by: Cody Team

97

17791

#### Problem 20. Summing digits

Created by: Cody Team

Tags strings, sum

35

7111

#### Problem 12. Fibonacci sequence

Created by: Cody Team

98

12349

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

Created by: Cody Team

25

5259

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

Created by: Cody Team

Tags matrices

39

6872

#### Problem 72. Interpolator

Created by: Cody Team

37

3181

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

Created by: Cody Team

76

8305

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

Created by: Cody Team

128

17625

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

Created by: Cody Team

Tags 3n+1, sample

76

7566

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

Created by: Cody Team

72

8125

#### Problem 22. Remove the vowels

Created by: Cody Team

Tags regexp, siam

25

5813

#### Problem 4. Make a checkerboard matrix

Created by: Cody Team

197

14688

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

Created by: Cody Team

Tags regexp, states

6

1099

#### Problem 62. Elapsed Time

Created by: Cody Team

Tags time

17

2593

#### Problem 39. Which values occur exactly three times?

Created by: Cody Team

Tags search

22

4728

#### Problem 40. Reverse Run-Length Encoder

Created by: Cody Team

Tags encoding

18

2304

#### Problem 87. Indexed Probability Table

Created by: Cody Team

Tags matlab

10

2091

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

Created by: Cody Team

Tags matlab

18

2735

#### Problem 28. Counting Money

Created by: Cody Team

Tags regexp, strings

16

3248

#### Problem 44. Trimming Spaces

Created by: Cody Team

10

2141

#### Problem 57. Summing Digits within Text

Created by: Cody Team

Tags strings

10

2204

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

Created by: Cody Team

Tags strings

5

1484

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

Created by: Cody Team

Tags matlab

13

3033

#### Problem 94. Target sorting

Created by: Cody Team

Tags sorting, matlab

28

4181

#### Problem 49. Sums with Excluded Digits

Created by: Cody Team

Tags strings

16

1970

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

Created by: Cody Team

26

2954

#### Problem 50. QWERTY coordinates

Created by: Cody Team

Tags indexing

19

1951

#### Problem 13. Remove all the consonants

Created by: Cody Team

Tags regexp, basics

25

3812

#### Problem 23. Finding Perfect Squares

Created by: Cody Team

Tags sets

147

15678

#### Problem 37. Pascal's Triangle

Created by: Cody Team

25

3855

#### Problem 27. Pangrams!

Created by: Cody Team

Tags strings

36

3410

#### Problem 80. Test for balanced parentheses

Created by: Cody Team

Tags regexp, parens

9

1133

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

Created by: Cody Team

Tags vectors

25

4865

#### Problem 74. Balanced number

Created by: Cody Team

Tags matlab

21

2675

#### Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

57

5136

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

Created by: Cody Team

Tags regexp, states

7

1097

#### Problem 51. Find the two most distant points

Created by: Cody Team

Tags distance

10

2492

#### Problem 53. Duplicates

Created by: Cody Team

6

2017

#### Problem 15. Find the longest sequence of 1's in a binary sequence.

Created by: Cody Team

73

5293

#### Problem 86. Renaming a field in a structure array

Created by: Cody Team

Tags matlab

10

1317

#### Problem 48. Making change

Created by: Cody Team

Tags money, subs

17

3030

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