All of the following are rational numbers except

1. 2/4

2. 1.33

3. −16

4. 3.

A rational number is a number that can be written in the form n/m where n and m are rational numbers.

2/4 = 2/4
1.33 = 4/3
-16 = -16/1

3.14159.. = ?

Therefore pi is an irrational number

The answer is to you problem is -16

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