# Problems

1 – 50 of 94
 Problem Title Likes Solvers Difficulty

#### Problem 8. Add two numbers

Created by: Cody Team

179

33150

#### Problem 2. Make the vector [1 2 3 4 5 6 7 8 9 10]

Created by: Cody Team

Tags basic, test, basics

169

41113

#### Problem 1. Times 2 - START HERE

Created by: Cody Team

Tags intro, math, easy

720

72132

#### Problem 3. Find the sum of all the numbers of the input vector

Created by: Cody Team

178

38164

#### Problem 5. Triangle Numbers

Created by: Cody Team

Tags math, triangle, nice

107

21409

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

Created by: Cody Team

114

20961

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

Created by: Cody Team

143

25104

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

Created by: Cody Team

61

14176

#### Problem 76. De-dupe

Created by: Cody Team

Tags matlab

11

2226

#### Problem 35. Quote Doubler

Created by: Cody Team

9

2224

#### Problem 33. Create times-tables

Created by: Cody Team

Tags matrices

83

12599

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

Created by: Cody Team

Tags easy, matrices

42

7650

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

Created by: Cody Team

83

15507

#### Problem 41. Cell joiner

Created by: Cody Team

Tags strings, matlab

28

4177

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

Created by: Cody Team

23

4827

#### Problem 12. Fibonacci sequence

Created by: Cody Team

93

11313

#### Problem 20. Summing digits

Created by: Cody Team

Tags strings, sum

32

6498

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

Created by: Cody Team

Tags matrices

36

6419

#### Problem 72. Interpolator

Created by: Cody Team

32

2857

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

Created by: Cody Team

70

7655

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

Created by: Cody Team

Tags 3n+1, sample

73

6977

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

Created by: Cody Team

105

15221

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

Created by: Cody Team

70

7568

#### Problem 4. Make a checkerboard matrix

Created by: Cody Team

183

13943

#### Problem 22. Remove the vowels

Created by: Cody Team

Tags regexp, siam

23

5290

#### Problem 62. Elapsed Time

Created by: Cody Team

Tags time

14

2195

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

Created by: Cody Team

Tags regexp, states

4

950

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

Created by: Cody Team

Tags search

20

4344

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

Created by: Cody Team

Tags encoding

15

1962

#### Problem 44. Trimming Spaces

Created by: Cody Team

9

1792

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

Created by: Cody Team

Tags matlab

16

2398

#### Problem 28. Counting Money

Created by: Cody Team

Tags regexp, strings

14

2866

#### Problem 50. QWERTY coordinates

Created by: Cody Team

Tags indexing

18

1814

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

Created by: Cody Team

Tags matlab

10

2693

#### Problem 57. Summing Digits within Text

Created by: Cody Team

Tags strings

10

1818

#### Problem 87. Indexed Probability Table

Created by: Cody Team

Tags matlab

7

1724

#### Problem 94. Target sorting

Created by: Cody Team

Tags sorting, matlab

26

3800

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

Created by: Cody Team

24

2590

#### Problem 49. Sums with Excluded Digits

Created by: Cody Team

Tags strings

12

1599

#### Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

55

4569

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

Created by: Cody Team

Tags strings

3

1170

#### Problem 13. Remove all the consonants

Created by: Cody Team

Tags regexp, basics

23

3495

#### Problem 23. Finding Perfect Squares

Created by: Cody Team

Tags sets

120

13230

#### Problem 37. Pascal's Triangle

Created by: Cody Team

21

3439

#### Problem 27. Pangrams!

Created by: Cody Team

Tags strings

30

3005

#### Problem 53. Duplicates

Created by: Cody Team

5

1619

#### Problem 74. Balanced number

Created by: Cody Team

Tags matlab

19

2311

#### Problem 80. Test for balanced parentheses

Created by: Cody Team

Tags regexp, parens

9

1002

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

Created by: Cody Team

Tags vectors

25

4357

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

Created by: Cody Team

5

1546

1 – 50 of 94