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Find Logic 1

10 months ago

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Find the next prime number
Find the next prime number or numbers for given n. For example: n = 1; out = 2; or n = [5 7]; out = [7 11]; ...

10 months ago

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Make a vector of prime numbers
Input(n) - length of vector with prime numbers Output(v) - vector of prime numbers Example: * n=1; v=2 * n=3; v=[2 3 5...

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Largest Twin Primes
<http://en.wikipedia.org/wiki/Twin_prime Twin primes> are primes p1, p2 = p1 + 2 such that both p1 and p2 are prime numbers. Giv...

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Mersenne Primes
A Mersenne prime is a prime number of the form M = 2^p - 1, where p is another prime number. For example, 31 is a Mersenne prim...

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Find nearest prime number less than input number
Find nearest prime number less than input number. For example: if the input number is 125, then the nearest prime number whi...

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Sophie Germain prime
In number theory, a prime number p is a *Sophie Germain prime* if 2p + 1 is also prime. For example, 23 is a Sophie Germain prim...

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Leap Year
According to Gregorian Calender(which is in use now, in many countries),decide whether a given year is a leap year or not. Give...

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leap year
find the number of leap years within the given time interval

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Friday or not
I love Friday. Please tell me whether the day is Friday. Dateformat is 'yyyy-mm-dd' or 'dd-mmm-yyyy' or 'mm/dd/yyyy'. Exa...

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Datetime basics
Generate the datetime scalar representing the current date

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Friday the 13th
According to superstition, lots of unpleasant stuff happens on Friday the 13th, so you might like to find the next occurence of ...

10 months ago

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Day counter function
Write a function called day_counter that returns the number of Mondays that fell on the first day of the month in a given year b...

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Count the days
Count the occurrence of a particular day (e.g. Monday) for a given duration.

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How long until the weekend?
Write a function a that takes a date vector as an input and returns the number of hours until the weekend begins. The beginning...

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Days until next NewYear ball drop
Given a date string in the form 'yyyy-mm-dd' or 'yyyy-mm-dd hh:mm:ss', calculate the number of *days* until the dropping of the ...

10 months ago

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Reverse Calculator
Use this reverse calculator and give correct output Its simple, In my Reverse calculator if you press 0 it will be considered...

10 months ago

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Additive persistence
Inspired by Problem 2008 created by Ziko. In mathematics, the persistence of a number is the *number of times* one must apply...

10 months ago

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Converting numbers back from extended form
Thanks for all the help you guys gave me on writing out the numbers in extended form in <http://www.mathworks.com/matlabcentral/...

10 months ago

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Numbers in extended form
Shhhhhhh. Don't tell my daddy, but I'm borrowing his Cody account so all of you very smart people can help me out. I just star...

10 months ago

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Ripping numbers apart!
So you have to "rip" a number apart into individual digits... The end output is a cell. That is if: x = 12345678 o...

10 months ago

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Decode a simplified barcode
Given a bar code from this <http://www.mathworks.com/matlabcentral/cody/problems/602-make-a-simplified-bar-code exercise>: Re...

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Make a simplified barcode
Given an integer to encode, make a barcode using the following encoding scheme: * The bar code is made from the binary versio...

10 months ago

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Math with Roman Numerals
Given a function R within (+,-,*,/) and two Roman numerals a & b, compute aRb in Roman numerals.

10 months ago

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Test if a Number is a Palindrome without using any String Operations
*Description* Given an integer _X_, determine if it is a palindrome number. That is, _X_ is equal to the _X_ with the digits ...

10 months ago

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Increment a number, given its digits
Take as input an array of digits (e.g. x = [1 2 3]) and output an array of digits that is that number "incremented" properly, (i...

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Convert Roman to Arabic Numerals
Based upon what I see on tv and at the movies, the use of Roman numerals indicates something is important or sophisticated (e.g....

10 months ago

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Number of 1s in the Binary Representation of a Number
*Description* Return the number of 1s in the (unsigned integer) binary representation of a number. This function should be ab...

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Make a Plot with Functions
Make a plot and test

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Plotting Practice
Plot cos(x) vs x as shown in the figure below. Include the appropriate title, x-label, and y-label. Note, it is case sensitive. ...

10 months ago