Michael Weidman

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1 – 50 of 352

Problem 1826. Find vampire numbers

Created by: Andrew Newell

Tags factors, number theory

1

Solution

124

Size

1

Solution

124

Size

Problem 2595. Polite numbers. Politeness.

Created by: Jan Orwat

Tags number theory, oeis

1

Solution

48

Size

1

Solution

48

Size

Problem 1774. Free passes for everyone!

Created by: Alfonso Nieto-Castanon

Tags matlab, hack, freepass

1

Solution

9

Size

1

Solution

9

Size

Problem 2248. Bell Number calculator

Created by: robin

Tags sets, partition

1

Solution

57

Size

1

Solution

57

Size

Problem 2734. N-th Odious

Created by: Jan Orwat

Tags number theory, oeis, pop series

2

Solutions

42

Size

2

Solutions

42

Size

Problem 2593. Polite numbers. N-th polite number.

Created by: Jan Orwat

Tags number theory, a138591

1

Solution

26

Size

1

Solution

26

Size

Problem 2056. Is this number Munchhausen?

Created by: Ted

Tags math, narcissistic number, munchhausen

2

Solutions

36

Size

2

Solutions

36

Size

Problem 2690. Armstrong Number

Created by: VIVEK RUHELA

Tags arithmetic, basic matlab

1

Solution

26

Size

1

Solution

26

Size

Problem 2733. Evil Number

Created by: Jan Orwat

Tags easy, number theory, oeis

1

Solution

21

Size

1

Solution

21

Size

Problem 2819. Find the 9's Complement

Created by: Pritesh Shah

Tags matlab

1

Solution

36

Size

1

Solution

36

Size

Problem 1925. Smith numbers

Created by: Sky Sartorius

Tags sum, factors

3

Solutions

82

Size

3

Solutions

82

Size

Problem 1997. Compute Fibonacci Number

Created by: Alex

Tags numbers, fibonacci

1

Solution

38

Size

1

Solution

38

Size

Problem 2061. Narcissistic number ?

Created by: Jean-Marie Sainthillier

Tags narcissistic

1

Solution

26

Size

1

Solution

26

Size

Problem 660. Find a subset that divides the vector into equal halves

Created by: Ned Gulley

Tags vector, asee, summation

2

Solutions

33

Size

2

Solutions

33

Size

Problem 2022. Find a Pythagorean triple

Created by: Tanya Morton

Tags pythagoras

1

Solution

39

Size

1

Solution

39

Size

Problem 2024. Triangle sequence

Created by: Tanya Morton

Tags pythagoras, fibonacci

2

Solutions

65

Size

2

Solutions

65

Size

Problem 2018. Side of a rhombus

Created by: Tanya Morton

Tags pythagoras, basic matlab

1

Solution

20

Size

1

Solution

20

Size

Problem 2017. Side of an equilateral triangle

Created by: Tanya Morton

Tags pythagoras, basic matlab

1

Solution

18

Size

1

Solution

18

Size

Problem 2019. Dimensions of a rectangle

Created by: Tanya Morton

Tags pythagoras, basic matlab

1

Solution

25

Size

1

Solution

25

Size

Problem 2023. Is this triangle right-angled?

Created by: Tanya Morton

Tags pythagoras

1

Solution

34

Size

1

Solution

34

Size

Problem 2016. Area of an equilateral triangle

Created by: Tanya Morton

Tags pythagoras, basic matlab

1

Solution

22

Size

1

Solution

22

Size

Problem 2020. Area of an Isoceles Triangle

Created by: Tanya Morton

Tags pythagoras, basic matlab

2

Solutions

26

Size

2

Solutions

26

Size

Problem 1974. Length of a short side

Created by: Tanya Morton

Tags pythagoras, basic matlab

1

Solution

19

Size

1

Solution

19

Size

Problem 2015. Length of the hypotenuse

Created by: Tanya Morton

Tags pythagoras, basic matlab, hypotenuse

1

Solution

14

Size

1

Solution

14

Size

Problem 2021. Is this triangle right-angled?

Created by: Tanya Morton

Tags geometry, triangle, pythagoras

1

Solution

22

Size

1

Solution

22

Size

Problem 1227. Generate a random matrix A of (1,-1)

Created by: Alex P.

Tags random, matrix, +-1

1

Solution

19

Size

1

Solution

19

Size

Problem 566. Sum of first n terms of a harmonic progression

Created by: Srivardhini

Tags sequences, series, poor_test_suite

2

Solutions

33

Size

2

Solutions

33

Size

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

Created by: Praveen Suvarna

Tags tricky

1

Solution

53

Size

1

Solution

53

Size

Problem 1087. Magic is simple (for beginners)

Created by: Jean-Marie Sainthillier

Tags magic square

1

Solution

19

Size

1

Solution

19

Size

Problem 324. 7 segment LED display

Created by: Alan Chalker

Tags number representations

1

Solution

85

Size

1

Solution

85

Size

Problem 462. letter yes yes & letter no no

Created by: AMITAVA BISWAS

Tags string, letter, alphabet

2

Solutions

24

Size

2

Solutions

24

Size

Problem 279. collision

Created by: AMITAVA BISWAS

Tags collision

1

Solution

24

Size

1

Solution

24

Size

Problem 1323. Alternating sum

Created by: Tim

Tags alternating sum

1

Solution

26

Size

1

Solution

26

Size

Problem 165. Woodall number

Created by: the cyclist

Tags woodall number theory

1

Solution

45

Size

1

Solution

45

Size

Problem 172. Test if a Number is a Palindrome without using any String Operations

Created by: @bmtran (Bryant Tran)

Tags palindrome, number, powers of 10

1

Solution

62

Size

1

Solution

62

Size

Problem 1278. Find the nearest integer

Created by: Bruce Raine

Tags match, integer, poor_test_suite

1

Solution

25

Size

1

Solution

25

Size

Problem 505. Back to basics 24 - Symbolic variables

Created by: Alan Chalker

Tags symbolic variables

1

Solution

12

Size

1

Solution

12

Size

Problem 1384. Who invented zero?

Created by: Harish Maradana

Tags fun, zero

1

Solution

9

Size

1

Solution

9

Size

Problem 720. Find number of days

Created by: Reza Ahmadzadeh

Tags date

2

Solutions

19

Size

2

Solutions

19

Size

Problem 876. Sum the entries of each column of a matrix which satisfy a logical condition.

Created by: Ken Deeley

Tags matrix manipulation

2

Solutions

16

Size

2

Solutions

16

Size

Problem 830. Fill a zeros matrix

Created by: Aurelien Queffurust

Tags logical operations

1

Solution

39

Size

1

Solution

39

Size

Problem 774. Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4

Created by: Julio

Tags matrix, poor_test_suite

2

Solutions

23

Size

2

Solutions

23

Size

Problem 326. Tricky timing

Created by: Alan Chalker

Tags time, timing

2

Solutions

14

Size

2

Solutions

14

Size

Problem 1420. only input

Created by: Marco Castelli

Tags easy, basic matlab

1

Solution

6

Size

1

Solution

6

Size

Problem 133. Volume of this donut

Created by: AMITAVA BISWAS

Tags geometry

2

Solutions

28

Size

2

Solutions

28

Size

Problem 1191. Will there be a new leader?

Created by: Robert Turner

Tags strings, spam

1

Solution

10

Size

1

Solution

10

Size

Problem 156. Parasitic numbers

Created by: the cyclist

Tags parasitic

2

Solutions

35

Size

2

Solutions

35

Size

Problem 312. Better bullseye matrix

Created by: Alan Chalker

Tags matrices

1

Solution

36

Size

1

Solution

36

Size

Problem 1545. Return area of square

Created by: Marek Kuklis

Tags matlab, basic matlab, <h1>test

1

Solution

12

Size

1

Solution

12

Size

Problem 1380. Celsius to Kelvin

Created by: Claudio Gelmi

Tags temperature, celsius

1

Solution

12

Size

1

Solution

12

Size

1 – 50 of 352