Problem 2672. Largest Geometric Series
In a geometric series, ratio of adjacent elements is always a constant value. For example, [2 6 18 54] is a geometric series with a constant adjacent-element ratio of 3.
A vector will be given. Find the largest geometric series that can be formed from the vector.
Example:
input = [2 4 8 16 1000 2000];
output = [2 4 8 16];
Update - Test case added on 21/8/22
Solution Stats
Problem Comments
-
3 Comments
Jean-Marie Sainthillier
on 18 Dec 2015
Interesting problem but tests are too tricky.
Rafael S.T. Vieira
on 16 Aug 2020
I am not sure that a list of equal numbers qualifies as a series. Would it be a geometric or an arithmetic series?
Lincoln Poon
on 17 Feb 2021
'Randperm' is making this question a whole lot harder...
Solution Comments
Show commentsGroup

Basics - Binary Logic
- 10 Problems
- 958 Finishers
- Find the longest sequence of 1's in a binary sequence.
- Convert given decimal number to binary number.
- Find out sum and carry of Binary adder
- Binary numbers
- Given an unsigned integer x, find the largest y by rearranging the bits in x
- Bit Reversal
- Relative ratio of "1" in binary number
- Binary code (array)
- Converting binary to decimals
- There are 10 types of people in the world
Problem Recent Solvers104
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!