Problem 23. Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the numbers. Otherwise return false.
Example:
Input a = [2 3 4]
Output b is true
Output is true since 2^2 is 4 and both 2 and 4 appear on the list.
Solution Stats
Problem Comments
-
39 Comments
Show
36 older comments
Christian Schröder
on 20 Oct 2023
@Tran Up to floating point arithmetic, sqrt(a(i))^2 is the same as a(i), so you're really just testing whether the vector a is non-empty.
(Note that the failing cases are the one where the correct answer is "false", while the ones where you succeed are the ones where it is "true").
Oren
on 8 Jan 2024
Nice little problem :)
Umar
on 22 May 2024
It was very interesting
Solution Comments
Show commentsGroup

Magic Numbers IV
- 20 Problems
- 24 Finishers
- Bouncy numbers
- It's going down. We're finding simbers!
- Euler–Mascheroni constant
- Hilbert numbers
- Pseudo Square Root (Inspired by Project Euler 266)
- Counting the Grand Primes
- Nth roots of unity
- Find Pseudo-Cyclic Number
- Lah Numbers
- Polar Form Complex Number Entry
- Give me Hamming on five, hold the mayo
- calculate PI without using pi function
- How brilliant are you?
- I'm going to enjoy watching you calculate, Mr Anderson
- Find two triangular numbers whose sum is input.
- Consecutive Powers
- Goldbach's marginal conjecture - Write integer as sum of three primes
- How many unique Pythagorean triples?
- Approximate e
- Amicable numbers
Problem Recent Solvers19285
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!