# Problems

1 – 50 of 94
 Problem Title Likes Solvers Difficulty

#### Problem 8. Add two numbers

Created by: Cody Team

223

36901

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

Created by: Cody Team

Tags basic, test, basics

189

44768

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

Created by: Cody Team

Tags intro, math, easy

1117

84508

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

Created by: Cody Team

231

43221

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

Created by: Cody Team

117

21745

#### Problem 5. Triangle Numbers

Created by: Cody Team

Tags math, triangle, nice

122

24186

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

Created by: Cody Team

167

28896

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

Created by: Cody Team

66

14883

#### Problem 76. De-dupe

Created by: Cody Team

Tags matlab

13

2673

#### Problem 35. Quote Doubler

Created by: Cody Team

9

2593

#### Problem 33. Create times-tables

Created by: Cody Team

Tags matrices

101

14704

#### Problem 41. Cell joiner

Created by: Cody Team

Tags strings, matlab

36

5068

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

Created by: Cody Team

Tags easy, matrices

44

8266

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

Created by: Cody Team

97

17801

#### Problem 20. Summing digits

Created by: Cody Team

Tags strings, sum

35

7118

#### Problem 12. Fibonacci sequence

Created by: Cody Team

98

12362

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

Created by: Cody Team

25

5260

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

Created by: Cody Team

Tags matrices

39

6875

#### Problem 72. Interpolator

Created by: Cody Team

37

3185

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

Created by: Cody Team

76

8310

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

Created by: Cody Team

128

17644

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

Created by: Cody Team

Tags 3n+1, sample

76

7569

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

Created by: Cody Team

72

8128

#### Problem 4. Make a checkerboard matrix

Created by: Cody Team

197

14698

#### Problem 22. Remove the vowels

Created by: Cody Team

Tags regexp, siam

25

5816

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

Created by: Cody Team

Tags regexp, states

6

1100

#### 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

2737

#### Problem 28. Counting Money

Created by: Cody Team

Tags regexp, strings

16

3248

#### Problem 44. Trimming Spaces

Created by: Cody Team

10

2142

#### Problem 57. Summing Digits within Text

Created by: Cody Team

Tags strings

10

2206

#### 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

3034

#### Problem 94. Target sorting

Created by: Cody Team

Tags sorting, matlab

28

4182

#### Problem 49. Sums with Excluded Digits

Created by: Cody Team

Tags strings

16

1971

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

Created by: Cody Team

26

2955

#### Problem 50. QWERTY coordinates

Created by: Cody Team

Tags indexing

19

1952

#### Problem 13. Remove all the consonants

Created by: Cody Team

Tags regexp, basics

25

3812

#### Problem 37. Pascal's Triangle

Created by: Cody Team

25

3857

#### Problem 23. Finding Perfect Squares

Created by: Cody Team

Tags sets

147

15691

#### Problem 27. Pangrams!

Created by: Cody Team

Tags strings

36

3411

#### Problem 80. Test for balanced parentheses

Created by: Cody Team

Tags regexp, parens

9

1134

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

Created by: Cody Team

Tags vectors

25

4866

#### Problem 60. The Goldbach Conjecture

Created by: Cody Team

Tags primes

57

5139

#### Problem 74. Balanced number

Created by: Cody Team

Tags matlab

21

2677

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

Created by: Cody Team

Tags regexp, states

7

1098

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

Created by: Cody Team

Tags distance

10

2494

1 – 50 of 94