# Problems

1 – 50 of 94
 Problem Title Likes Solvers Difficulty

#### Problem 8. Add two numbers

Created by: Cody Team

193

33793

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

Created by: Cody Team

Tags basic, test, basics

176

41781

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

Created by: Cody Team

Tags intro, math, easy

807

74616

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

Created by: Cody Team

194

39062

#### Problem 5. Triangle Numbers

Created by: Cody Team

Tags math, triangle, nice

109

21895

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

Created by: Cody Team

114

21124

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

Created by: Cody Team

149

25804

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

Created by: Cody Team

61

14309

#### Problem 76. De-dupe

Created by: Cody Team

Tags matlab

11

2285

#### Problem 35. Quote Doubler

Created by: Cody Team

9

2263

#### Problem 33. Create times-tables

Created by: Cody Team

Tags matrices

86

12926

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

Created by: Cody Team

85

15886

#### Problem 41. Cell joiner

Created by: Cody Team

Tags strings, matlab

28

4287

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

Created by: Cody Team

Tags easy, matrices

43

7767

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

Created by: Cody Team

23

4890

#### Problem 12. Fibonacci sequence

Created by: Cody Team

94

11510

#### Problem 20. Summing digits

Created by: Cody Team

Tags strings, sum

32

6622

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

Created by: Cody Team

Tags matrices

37

6498

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

Created by: Cody Team

Tags 3n+1, sample

73

7095

#### Problem 72. Interpolator

Created by: Cody Team

35

2970

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

Created by: Cody Team

72

7794

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

Created by: Cody Team

109

15632

#### Problem 22. Remove the vowels

Created by: Cody Team

Tags regexp, siam

23

5369

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

Created by: Cody Team

71

7652

#### Problem 4. Make a checkerboard matrix

Created by: Cody Team

186

14167

#### Problem 62. Elapsed Time

Created by: Cody Team

Tags time

15

2236

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

Created by: Cody Team

Tags regexp, states

5

970

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

Created by: Cody Team

Tags encoding

16

1995

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

Created by: Cody Team

Tags search

20

4400

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

Created by: Cody Team

Tags matlab

16

2435

#### Problem 44. Trimming Spaces

Created by: Cody Team

9

1827

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

Created by: Cody Team

Tags matlab

10

2726

#### Problem 50. QWERTY coordinates

Created by: Cody Team

Tags indexing

18

1862

#### Problem 28. Counting Money

Created by: Cody Team

Tags regexp, strings

14

2911

#### Problem 87. Indexed Probability Table

Created by: Cody Team

Tags matlab

7

1752

#### Problem 57. Summing Digits within Text

Created by: Cody Team

Tags strings

10

1853

#### Problem 94. Target sorting

Created by: Cody Team

Tags sorting, matlab

26

3848

#### Problem 49. Sums with Excluded Digits

Created by: Cody Team

Tags strings

13

1634

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

Created by: Cody Team

25

2622

#### Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

56

4619

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

Created by: Cody Team

Tags strings

3

1195

#### Problem 23. Finding Perfect Squares

Created by: Cody Team

Tags sets

133

13704

#### Problem 13. Remove all the consonants

Created by: Cody Team

Tags regexp, basics

23

3568

#### Problem 37. Pascal's Triangle

Created by: Cody Team

21

3485

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

Created by: Cody Team

Tags vectors

25

4460

#### Problem 27. Pangrams!

Created by: Cody Team

Tags strings

33

3066

#### Problem 53. Duplicates

Created by: Cody Team

5

1653

#### Problem 74. Balanced number

Created by: Cody Team

Tags matlab

19

2355

#### Problem 80. Test for balanced parentheses

Created by: Cody Team

Tags regexp, parens

9

1020

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

Created by: Cody Team

5

1574

1 – 50 of 94