Question

Classify √5
A. Whole Number
B. Integer
C. Rational Number
D. Irrational Number

Answer 1

irrational number if im not mistaken

Answer 2

am i right?

Answer 3

It's certainly not a whole number of integer, because 2^2 = 4 and 3^2 = 9.

And it also turns out it's not a rational number, although that's harder to prove. But yes, you're right:

\( \sqrt{5} \) is irrational.

Answer 4

my guess is you are just supposed to know that
\[\sqrt{a}\] is irrational unless \[a\] is a perfect square (like 16 or 25)

Answer 5

by "know" i mean 'believe'