# Problems

1 – 50 of 94
 Problem Title Likes Solvers Difficulty

#### Problem 8. Add two numbers

Created by: Cody Team

207

35041

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

Created by: Cody Team

Tags basic, test, basics

184

43023

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

Created by: Cody Team

Tags intro, math, easy

942

78714

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

Created by: Cody Team

207

40769

#### Problem 5. Triangle Numbers

Created by: Cody Team

Tags math, triangle, nice

114

22800

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

Created by: Cody Team

115

21362

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

Created by: Cody Team

161

27030

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

Created by: Cody Team

64

14488

#### Problem 76. De-dupe

Created by: Cody Team

Tags matlab

11

2410

#### Problem 35. Quote Doubler

Created by: Cody Team

9

2355

#### Problem 41. Cell joiner

Created by: Cody Team

Tags strings, matlab

31

4509

#### Problem 33. Create times-tables

Created by: Cody Team

Tags matrices

92

13578

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

Created by: Cody Team

Tags easy, matrices

43

7928

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

Created by: Cody Team

89

16561

#### 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

11741

#### 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

16339

#### 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

7798

#### 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

2340

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

Created by: Cody Team

Tags encoding

16

2090

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

Created by: Cody Team

Tags search

21

4500

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

Created by: Cody Team

Tags matlab

16

2526

#### Problem 87. Indexed Probability Table

Created by: Cody Team

Tags matlab

8

1844

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

Created by: Cody Team

Tags matlab

10

2808

#### Problem 44. Trimming Spaces

Created by: Cody Team

9

1910

#### Problem 28. Counting Money

Created by: Cody Team

Tags regexp, strings

15

3014

#### Problem 57. Summing Digits within Text

Created by: Cody Team

Tags strings

10

1953

#### Problem 50. QWERTY coordinates

Created by: Cody Team

Tags indexing

18

1979

#### Problem 94. Target sorting

Created by: Cody Team

Tags sorting, matlab

26

3953

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

Created by: Cody Team

25

2714

#### Problem 49. Sums with Excluded Digits

Created by: Cody Team

Tags strings

13

1725

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

Created by: Cody Team

Tags strings

3

1275

#### Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

56

4725

#### Problem 37. Pascal's Triangle

Created by: Cody Team

23

3587

#### Problem 13. Remove all the consonants

Created by: Cody Team

Tags regexp, basics

23

3675

#### Problem 27. Pangrams!

Created by: Cody Team

Tags strings

33

3173

#### Problem 23. Finding Perfect Squares

Created by: Cody Team

Tags sets

139

14517

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

Created by: Cody Team

Tags vectors

25

4581

#### Problem 80. Test for balanced parentheses

Created by: Cody Team

Tags regexp, parens

9

1063

#### Problem 53. Duplicates

Created by: Cody Team

5

1758

#### Problem 74. Balanced number

Created by: Cody Team

Tags matlab

19

2448

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

Created by: Cody Team

Tags distance

8

2235

1 – 50 of 94