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**Content Feed**

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Acid and water

⚖ ⚖ ⚖ ⚖ ⚖ ⚖ ⚖ ⚖ Assume that there is a 100 liter tank. It is initially fi...

22 hours ago

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time of day

Calculate the time of day in days, hours, minutes or seconds passed since the beginning of the day, depending on the unit. The u...

22 hours ago

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Construyendo matrices parte 2

Construye la siguiente matriz a partir de otros tres vectores/matrices. [ 1 8 15 3 3 3 3 2 9 16 3 3...

22 hours ago

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Expand 10^n to Powers of 4

Given an integer n, return the coefficients c = [c_n,c_n-1,...,c_0] Such that 10^n = c_n*4^(n) + c_n-1*4^(n-1...

22 hours ago

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Still more miles to go before I sleep

It's time for more odometer fun. Last problem, my car's odometer hit 56789. It's coming up on 111111 now, which (barring a maj...

23 hours ago

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Muphry's Law of MATLAB

You're running some simple multiplication problems through MATLAB for error checking purposes, but nothing seems to come up with...

24 hours ago

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Lunar Arithmetic (Multiplication)

<https://oeis.org/A087061 OEIS link for a description of lunar arithmetic> Simply take the larger digit when adding and take ...

1 day ago

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Numbers on 7-segment

This is a 7-segment: _ |_| |_| It's a 3-by-3 char matrix.It has made by 3 characters: '_' , '|' and ' ' (space...

1 day ago

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Permutation Via Multiplication

Given two numbers a and b, determine if the product ab is a permutation of the digits of a. For example, this is always true for...

1 day ago

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The last non-zero digit of a factorial

For given positive integer n, what is the last non-zero digit of n!? Example: factorial(11) = 39916800 Last non-zero d...

1 day ago

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Lunar Arithmetic (Addition)

<https://oeis.org/A087061 OEIS link for a description of lunar arithmetic> Simply take the larger digit. Example 1: ...

1 day ago

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Smallest n, for n! to have m trailing zero digits

For given positive integer n, its factorial often has many trailing zeros, in other words many factors of 10s. In order for n! t...

1 day ago

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The number of trailing zero digit of a factorial

For given positive integer n, take factorial of that number. How many trailing zeros does it have? Example: factorial(11) = 3...

1 day ago

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Whole Number Un-Concatenator

Write a function that accepts an integer and an index digit and returns a vector containing two integers which are the leading a...

1 day ago

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Whole Number Concatenator

Write a function that concatenates whole numbers. For example: numcat(111,222) should return 111222 numcat(1,2,3,4,5) s...

1 day ago

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Pattern Sum

Write a function which receives two single digit positive integers, (k and m) as parameters and calculates the total sum as: k...

1 day ago

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Toads and Frogs Puzzle

On a one-dimensional board with n + m + 1 cells, there are n counters in the first n cells representing Toads and m counters in ...

1 day ago

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Weighted Convolution

Given two input vectors x = [x_1, x_2, ..., x_K] and y = [y_1, y_2, ..., y_K] of equal length, compute the weighted convolution ...

1 day ago

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Rotation matrix of a sequence of 3D points

Given a sequence of rotation matrices Rotation_Matrix [3x3xN], and a sequence of 3D points [3x1xN], compute the [3xN] sequence i...

1 day ago

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Feeling lucky?

Guess which number Cody is thinking (1 to 10)? (This is a game of luck more than skill. Good luck!)

3 days ago

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Guess

A random number between 1 and 10 is created for the variable y. Guess what its value is.

3 days ago

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feeling VERY lucky?

Just like Matthew's problem <http://www.mathworks.com/matlabcentral/cody/problems/2793 2793> and Edward's problem <http://www.ma...

3 days ago

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Fizz

Dado um número inteiro n, retorne 'fizz' se esse valor for multiplo de 3, ou retorne o valor caso contrario. Fizz(3) = 'fizz'; ...

3 days ago

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String Logic 11

Examples: 'SUNDAY' --> 6 'MONDAY' --> 6 'TUESDAY' --> 7 'WEDNESDAY' --> 9 'THURSDAY' --> 8 'FRIDAY' --> 5 'SATURDAY' --...

3 days ago

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String Logic 9

Examples: 'CAT' --> 'C' 'DOG' --> 'G' 'ROSLY' --> 'R' 'PROBLEM' --> 'M' 'TRUST' --> 'T' 'BASIC' --> 'C' 'GIANT' --> 'I'...

3 days ago

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String Logic 12

Examples: 'CAT' --> 'ACT' 'DOG' --> 'DGO' 'ROSY' --> 'ORSY' 'MOSTLY' --> 'LMOSTY'

3 days ago

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Find out if Quadratic Equation has real roots or not?

Input [a b c] ax^2+bx+c=0 Output [1 or 0] 1= Quadratic Equation has real roots 0= Quadratic Equation has imaginary roots

3 days ago

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String Logic 4

Example: 'CAT' --> 'IGZ' 'DOG' --> 'JUM' 'MATLAB' --> 'SGZRGH' 'ROSY' --> 'XUYE' 'TRUST' --> 'ZXAYZ' 'MOSTLY' --> 'SUYZ...

3 days ago