Question

Which of the following is not a perfect square?
A. 50
B. 49
C. 121
D. 1

Answer 1

Do you know what a perfect square is? If not, what do you think it could mean?

Answer 2

http://www.mathwarehouse.com/arithmetic/numbers/what-is-a-perfect-square.php

tl;dr A perfect square means the number \(A\) is a product of two values that are exactly the same, or \(squared\):\[\Large{b(b)=A\rightarrow b^{2}=A}\]

Answer 3

This also means that:\[\Large{\sqrt{A}=b}\]A "square root" symbol, or \(\sqrt{}\), means to reverse the squaring process.\[\large{b^{2}=A,\rightarrow\sqrt{A}=b}\]

Answer 4

@Dr.gray How are you doing? Are you confused?

Answer 5

yes i'm confused????????????????

Answer 6

Okay, yes, you're confused.
Where are you confused?

Answer 7

When you think of a perfect square, think about a number that can be multiplied by itself. So a perfect square could be 1*1 = 1 and 2*2=4 and 3*3=9, in all these 1,4, and 9 are perfect squares. If you can think of the numbers given, which numbers are multiplied by themselves to get 50, 49, 121, and 1?

Answer 8

Let me help, please.

What are the two identical numbers (integers) which their product is one of the choices you offer?

Answer 9

Hint: choice B) \(49\)
What is the square root of \(49\)? It is \(7\) because \(7\times7=49\).
Apply the same idea to the rest of the options and check which one does not give you a whole number as a result.

Answer 10

(B is not the answer, btw)

Answer 11

it's A

Answer 12

Yes (:

Answer 13

Good job!