Question

a1: super sets
real numbers
rational numbers
integers
whole numbers
natural numbers
irrational numbers
$sqrt{28}$
$-sqrt{13}$
-29
0
0.1
$pi$
-36
$\frac{1}{9}$
0
160
$sqrt{25}$
12

1. which number is not located in the correct set of numbers?

a. $\frac{1}{9}$
b. $pi$
c. $sqrt{25}$
d. 160

Explanation:

Step1: Evaluate Option A

$\frac{1}{9}$ is a rational number (fraction of integers), placed correctly in Rational Numbers set.

Step2: Evaluate Option B

$\pi$ is an irrational number (non-terminating, non-repeating decimal), but it is placed in the Rational Numbers set, which is incorrect.

Step3: Evaluate Option C

$\sqrt{25}=5$, a natural number, placed correctly in Natural Numbers set.

Step4: Evaluate Option D

160 is a natural number, placed correctly in Natural Numbers set.

Answer:

B. $\pi$