# Problems

51 – 100 of 1,131
 Problem Title Likes Solvers Difficulty

Created by: Tom

2

280

Created by: Ted

0

59

#### Problem 133. Volume of this donut

Created by: AMITAVA BISWAS

Tags geometry

3

180

#### Problem 640. Getting logical indexes

Created by: Doug Hull

8

1004

#### Problem 48960. Swap Red and Blue

Created by: Alisio

Tags swap, pixels, red

0

12

Created by: Sibi

Tags logic

0

8

#### Problem 50063. Number Puzzles - 019

Created by: Doddy Kastanya

Tags puzzles

0

18

#### Problem 43007. Euclidean inter-point distance matrix

Created by: John D'Errico

1

21

#### Problem 1048. Detect a number and replace with two NaN's

Created by: Praveen Suvarna

Tags tricky

3

187

#### Problem 1150. Polybius Square

Created by: Mehmet OZC

3

39

#### Problem 1161. Binpack Contest: Retro

Created by: Richard Zapor

0

10

#### Problem 1226. Non-zero bits in 10^n.

Created by: SK

Tags binary, powers, bits

3

36

#### Problem 1277. How many days does the cat take to climb out of the hole?

Created by: Bruce Raine

4

75

0

40

#### Problem 1509. Fast Fourier transform algorithm

Created by: Bob Levy

Tags algorithms

0

13

#### Problem 2544. Determine if given number is perfect

Created by: sunny d

1

46

#### Problem 2591. Does the coin touch the line?

Created by: Georges

3

32

#### Problem 263. Nonuniform quantizer as a piecewise constant function

Created by: Steve Eddins

Tags quantizer

0

53

#### Problem 272. Generalized N-Cards Problem

Created by: @bmtran (Bryant Tran)

4

26

Created by: goc3

1

16

#### Problem 320. Maintain shape of logical-index mask

Created by: the cyclist

2

66

#### Problem 1892. LIFO Validation

Created by: Paul Berglund

Tags lifo

1

12

#### Problem 1954. Write a cubic formula function

Created by: Tyler

2

17

#### Problem 207. hackathon impossible

Created by: Alfonso Nieto-Castanon

Tags rand, hack

2

49

#### Problem 2185. Speed of light:Experiment

Created by: Zikobrelli

2

52

#### Problem 2268. Given a number between 1-365 (a day number in a non leap year) , find what day of what month it is.

Created by: Hassan Dehghani

2

30

#### Problem 42485. Eliminate Outliers Using Interquartile Range

Created by: Monica Roberts

Tags outlier

2

21

#### Problem 42785. Choose group with people

Created by: Pritom Kumar Mondal

Tags math, easy

0

18

#### Problem 44431. continuous compounding

Created by: jean claude

Tags finance

1

24

#### Problem 44478. Exponential decay

Created by: Thomas Steffen

1

20

#### Problem 45498. Trace the path of a harmful chemical in an ecological network

Created by: Karl Ezra Pilario

2

25

#### Problem 44530. Are you more familiar with iteration methods or Linear Algebra? Let's see together.

Created by: Riccardo Dessì

Tags math, basic, matlab

1

23

#### Problem 43968. Concatenated roots

Created by: Daniel Pereira

3

33

#### Problem 43975. Permute the unique values of a vector without sorting

Created by: Gareth Lee

Tags unique, permute

3

14

#### Problem 44070. Under the sea: Snell's law & total internal reflection

Created by: Jihye Sofia Seo

2

41

#### Problem 46573. Determine the winner of a goofy golf tournament

Created by: ChrisR

0

15

#### Problem 46973. How many bytes an audio requires from RAM?

Created by: Rafael S.T. Vieira

1

8

#### Problem 628. Book Club

Created by: @bmtran (Bryant Tran)

3

18

#### Problem 700. Monty Hall

Created by: Richard Zapor

3

38

#### Problem 701. Play Tic-Tac-Toe: Easy Bots

Created by: Richard Zapor

2

20

#### Problem 784. Cody Computer Part 4 : Are you a morning Cody player Addicted ?

Created by: Aurelien Queffurust

Tags stupid

1

79

#### Problem 854. Find the list of all open files

Created by: Aurelien Queffurust

Tags fid

2

41

#### Problem 2140. Alternately upper-lower case

Created by: Koteswar Rao Jerripothula

Tags strings

1

123

Created by: goc3

1

97

#### Problem 129. All capital?

Created by: AMITAVA BISWAS

3

632

#### Problem 46828. Approximate functions 2 (★★★★)

Created by: Anirban Pal

1

23

4

65

#### Problem 8050. Stress-Strain Properties - 3

Created by: goc3

Tags test, stress, strain

2

83

#### Problem 50614. Number Puzzle - 100

Created by: Doddy Kastanya

Tags puzzles

1

19

#### Problem 159. Figurate number triangle

Created by: the cyclist

0

94

51 – 100 of 1,131