Consider the following irrational numbers: 1. $$rac{3}{ ext{sqrt}(7)}$$ 2. $$ ext{sqrt}(18)$$ 3. $$rac{5 + ext{sqrt}(19)}{2}$$ 4. $$ ext{sqrt}(5) + 2$$ Which of these numbers is not an irrational number?

Exam

ISEE Upper Level

Section

Difficulty

Mathematics Achievement

Identify the Non-Irrational Number

Very Hard Number Operations Irrational Numbers

Consider the following irrational numbers:

Which of these numbers is not an irrational number?

1. $$\frac{3}{\text{sqrt}(7)}$$

2. $$\text{sqrt}(18)$$

3. $$\frac{5 + \text{sqrt}(19)}{2}$$

4. $$\text{sqrt}(5) + 2$$

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