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Identifying teenager

Suppose the age of a person is given. If he/she is a teenage, answer is 'yes'. Otherwise, the answer is 'no'.

1 month ago

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Split Even Number Into Two Primes

Given an even whole number n (> 2), return a 2-element vector of primes, p, such that p(1) + p(2) = n. Fun note: technically it...

1 month ago

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Boustrophedon

Given a vector v and a positive integer n, return an m-by-n matrix containing the elements of v row-wise, alternating left-to-ri...

1 month ago

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Where the Four Corners Am I? (Vectorized)

NOTE: this problem is intended to build on problem #55960 ("Where the Four Corners Am I?"). You may wish to solve that problem f...

2 months ago

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Where the Four Corners Am I?

The "Four Corners" region of the US is where Colorado, Utah, Arizona, and New Mexico all meet - the only place where four states...

2 months ago

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Next Tribonacci Number

The "Tribonacci" sequence is an extension of the idea of the Fibonacci sequence: That is, each new term is the sum of the thr...

2 months ago

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Generate Tribonacci Sequence

The "Tribonacci" sequence is an extension of the idea of the Fibonacci sequence: That is, each new term is the sum of the thr...

2 months ago

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Calculate Wind Chill Factor

The NWS Wind Chill Temperature (WCT) index formula for calculating the dangers from winter winds and freezing temperatures: Cal...

2 months ago

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Korselt's Criterion

A composite integer n (n>=2) divides b^n-b, i.e. mod(b^n-b,n)==0, for all integers b if and only if n is square-free (doesn't ha...

2 months ago

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Sum of Consecutive Positive Integers Equals Product of Limiting Values

Determine m and n for the following equation: For example: 3 + 4 + 5 + 6 = 6*3 is the first occurance that satisfies the equat...

2 months ago

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Heronian Triangles with Consecutive Integral Sides and Integral Area

Hero's area formula for any triangle with sides a, b, c is: . Heronian triangles are triangles having integral sides and integr...

2 months ago

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Calculate pi using the Mandelbrot Set.

The Mandelbrot Set is a set of complex numbers built around a simple iterative equation for which the orbit of the critical poin...

2 months ago

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Leonardo primes

Leonardo numbers are defined by following recurrence relation: Leonard prime is Leonardo number which is also prime (see ...

2 months ago

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List numbers that are not squares

The numbers 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 17, etc. are not perfect squares. Write a function to list the th term in ...

2 months ago

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Sub-Diagonal Sum

Given a (m x n) matrix and a value r {1,-1}, change every element to the sum of the diagonal led by the element. r=1 > regular ...

2 months ago

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Determine if x is a combination of m and n

Given positive integers x, m, and n, determine if x can be written as x = am + bn for any (non-negative) integers a and b. Your ...

2 months ago

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Find Closest Constant

Given a number x, return the value that is closest to x from this list of constants: 0, 1, , e, , (also known as ). For exampl...

2 months ago

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Easy Sequences 75: Easy as Pisano Pi

Pisano period , of an integer , is the period in which the sequence of Fibonacci numbers modulo repeats. For example it is not ...

2 months ago

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Measure the hydraulic conductivity with a falling-head permeameter

A falling-head permeameter is another device for measuring the hydraulic conductivity of a soil sample. In this problem the sam...

2 months ago

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Matrix Quadrants

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 months ago

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Easy Sequences 72: Complete Graph

In Graph Theory, we say a graph is a Complete Graph, if all of its nodes are connected to evey other nodes in the graph. Example...

3 months ago

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Measure the hydraulic conductivity with a constant-head permeameter

A constant-head permeameter is a device for measuring the hydraulic conductivity of a soil sample. In this problem the sample i...

3 months 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

3 months ago

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AZPC Oddly Triangular: N=10/11/13/14 Digits 3/7/9 Part 3 of 5

AZPC created the Oddly Triangular contest on 9/7/22. The challenge is to find the longest sequence of N odd digits such that sum...

3 months ago

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AZPC Oddly Triangular: N=35/305 using Digits 3/7/9 Part 5 of 5

AZPC created the Oddly Triangular contest on 9/7/22. The challenge is to find the longest sequence of N odd digits such that sum...

3 months ago

Solved

AZPC Oddly Triangular: N=34/304 using Digits 3/7/9 Part 4 of 5

AZPC created the Oddly Triangular contest on 9/7/22. The challenge is to find the longest sequence of N odd digits such that sum...

3 months ago

Solved

AZPC Oddly Triangular: N=8/9 Digits 3/7/9 Part 2 of 5

AZPC created the Oddly Triangular contest on 9/7/22. The challenge is to find the longest sequence of N odd digits such that sum...

3 months ago

Solved

AZPC Oddly Triangular: Small N Part 1 of 5

AZPC created the Oddly Triangular contest on 9/7/22. The challenge is to find the longest sequence of N odd digits such that sum...

3 months ago

Solved

Ambiguous concatenation

Give two expressions that can have different meaning inside/outside a concatenation expression.

3 months ago

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Rotation Matrix to Euler Angles

Given a rotation matrix, generate the Euler Angles as output [phi,theta,psi]. [phi is a rotation around X-axis, theta is rotatio...

3 months ago