Problem 49632. Matrix Pattern 9

Created by Doddy Kastanya

Solve Later

Find the pattern for the element of the matrix.
mat_pattern(2) = [
     4     7
     5     8];
mat_pattern(4) = [
     4     7    10    13
     5     8    11    14
     6     9    12    15
     7    10    13    16];

Solve

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265 Solutions
122 Solvers

Last Solution submitted on Jan 13, 2026

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6 Comments

6 Comments

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William on 27 Dec 2020

Doddy -- I think the last two columns of y_correct in problem 4 are incorrect.

Binbin Qi on 2 Jan 2021

@William , I think it is correct.

William on 2 Jan 2021

Binbin -- Yes, I see. It's just a more difficult problem than I thought it was!

Binbin Qi on 3 Jan 2021

@William， Yes. It is hard to guess the author's thoughts

Rafael S.T. Vieira on 30 Oct 2022

tip: pi is used as a factor.

Alexander Ross on 13 Sep 2025

Can confirm that Rafael's hint proved vital to arriving at a solution that 1) works on all the cases in the test suite and 2) relies on the hidden pattern. Not all accepted solutions accomplished the latter.

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