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Find the nth nude number
The number 672 is a nude number because it openly displays three of its divisors: 6, 7, and 2. In other words, a nude number is ...

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Determine whether a number is a fibodiv number
The number 14 is a fibodiv number because you can divide it into 1 and 4, use those numbers as the seeds for a Fibonacci sequenc...

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Determine whether a number is unprimeable
The number 204 is unprimeable because no single digit can be changed to make it prime. In contrast, the number 207 is not unprim...

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A sequence of Ones
You are given number(s) with all digits - 1. Your answer will depend on the count of 1 in the given number, for example - x1...

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Compute the Sequence of the Day
A sequence starts with 1 and 2, and each subsequent term is the sum of the digits of the product of the previous two terms. As a...

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Total resistance of resistors in series
What is the total resistance of a number of resistors in series? A vector R contains the resistances (in Ohm) of n resistors, w...

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Total resistance of resistors in parallel
What is the total resistance of a number of resistors in parallel? A vector R contains the resistances (in Ohm) of n resistors,...

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Total resistance of a network of resistors in series and parallel
What is the total resistance of a network of resistors in series and in parallel? A matrix R contains the resistances (in Ohm) ...

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Draw 'P' !!!
Draw a n by n matrix 'P' using 0s and 1s. (n is odd and greater than 4) if n=5 , then the output will be [1 1 1 1 1 1 0 0 0...

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Sum of two number using (regexp, varargin) comand?
Sum two number a &b and get there result in c using the rexp and varargin comand.

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Time reverse indices
Time reverse the index values as follows IndexIn = [7 1 0] IndexOut = [7 6 0] Note that the indices are zero based and so...

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Total energy

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Draw 'Y'
Draw 'Y' in an x-by-x matrix (where x is odd and x >= 3) Examples: x = 3 y = [1 0 1 0 1 0 0 1 0] x = 5 y = [1...

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n-th digit of write-down all numbers
Write down number as 123456789101112131415161718192021222324252627282930... what's the n-th digit? input n and get the digit.

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Palindrome Problem 1
Continued Problem 50033: A palindrome is one-thirteenth of the sum of and , where and are also palindrome. Give an example o...

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Count of Unique Elements of a Vector
Count the number of times each unique element appears in a vector. Example: Input x = [2 9 1 2 4 9 2] Output y = [1 1; 2 3; 4...

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Random Problem14 - Multiply a vector by a scalar of 2
Multiply a vector by a scalar of 2

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Get the n-th rand number with given seed
Given seed s, return the n-th rand number using rand(). Round the answer with 4 digits. n is a postive integer.

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Summy's even sum

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Summy's odd sum

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non-repitition of numbers in a vector

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Which Prime
Given two prime numbers, specify the relation between them i.e. - 'Twin Prime', 'Cousin Prime', 'Sexy Prime' or 'None'

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Use a timetable to analyze a train timetable (Part 5)
You are analyzing a train timetable (you have some time to kill since you just missed your train!) How many trains depart each d...

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Use a timetable to analyze a train timetable (Part 4)
You are analyzing a train timetable (you have some time to kill since you just missed your train!) What is the average daily tri...

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Use a timetable to analyze a train timetable (Part 3)
Oh no, you missed your train to Boston (again?)! How many times can you miss that train today? (In other words, how many Boston ...

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Use a timetable to analyze a train timetable (Part 2)
Oh no, you missed your train to Boston! Find the departure time of the next available train by analyzing the train timetable. Yo...

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Number Puzzle - 119

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Number Puzzle - 118

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Number Puzzle - 117

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Number Puzzle - 116

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