Community Profile # Lincoln Poon

Last seen: Today Active since 2020

A university student working his way through programming.

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Multiplos 7
Escreva um programa que mostre todos os números entre 5 e 100 que são divisíveis por 7, mas não são múltiplos de 5. Os números o...

environ 5 heures ago

Solved

List the delete-a-digit primes

environ 7 heures ago

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Find distance travelled by an object starting from rest in time 't' and linear acceleration 'a' = 3t
Find distance travelled by an object starting from rest in time 't' with linear acceleration a = 3t. You are given time t as an ...

1 jour ago

Solved

Array Concatenation (2)
Given two matrices, a and b, concatenate the two matrices vertically, i.e., the number of rows of the result should be equal to ...

1 jour ago

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Convert a given Character to its decimal equivalent value
Convert a given character to its decimal equivalent value according to the ascii table. if x = '!'; y = 33; if x = 'u'; ...

1 jour 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 real roots

2 jours ago

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Array Concatenation (1)
Given two matrices, a and b, concatenate the two matrices horizontally, i.e., the number of columns of the result should be equa...

2 jours ago

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Calculate a modified Levenshtein distance between two strings
Inspired by the Cody problem found <http://www.mathworks.com/matlabcentral/cody/problems/93-calculate-the-levenshtein-distance-b...

2 jours ago

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Write a function that takes N as the input, and outputs a matrix whose upper-left (NxN) quadrant contains all ones, the lower-ri...

2 jours ago

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Arrange Vector in descending order
If x=[0,3,4,2,1] then y=[4,3,2,1,0]

2 jours ago

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Sum of all the divisors of n

2 jours ago

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Sum the elements in rows of the Levine triangle
The Levine triangle starts as follows: Row 0: 2 Row 1: 1 1 Row 2: 1 2 Row 3: 1 1 2 To construct each row, r...

2 jours ago

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Square root
Given x (a matrix), give back another matrix, where all the elements are the square roots of x's elements.

2 jours ago

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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...

3 jours ago

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Easy Sequences 4: Eliminate the Days of Confusion
If a date is written in purely numeric format some dates can be confusing, if we don't know the date format used. For example, "...

3 jours ago

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Easy Sequences 3: Prime 44-number Squares
The positive integers 62 and 238 are related. Their squares (3844 and 56,644) both end in '44'. In fact, 62 and 238 are the 3rd ...

3 jours ago

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Broken numlock key, oppps !
The numlock key on my computer is pressed and is now broken, so I cant press it to switch off the numlock mode. And hence I am n...

3 jours ago

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Pancake sorting
Sort a stack of pancakes by flipping them using spatula. * There are _N_ pancakes with diameters _1:N_. * Spatula can be ins...

3 jours ago

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How to reverse spdiags?
The spdiags function extracts all nonzero diagonals from the m-by-n matrix A. So if A=[1 2 3;4 5 6;7 8 9], spdiags(A)=[7 4...

3 jours ago

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Fangs of a vampire number
A vampire number is a number v that is the product of two numbers x and y such that the following conditions are satisfied: at ...

3 jours ago

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Project Euler: Problem 9, Pythagorean numbers
A Pythagorean triplet is a set of three natural numbers, a b c, for which, a^2 + b^2 = c^2 For example, 3^2 + 4^2 = 9 + 16 ...

3 jours ago

Solved

Mathematical formula
Find the value of the expression given the values of variables t and k. Assume g=9.81

3 jours ago

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Find all prime factors of the input
Given an input x, find its all prime factors. Return the vector with all factors in ascending order. Efficiency is the key here...

3 jours ago