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isite Week $1$ Homework

Question $6,$ IR$\mathrm{.}1\mathrm{.}45$

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Consider the following numbers. Which of these numbers are natural numbers?

$\{\sqrt[\phantom{2}]{3},0,6,\sqrt[\phantom{2}]{49},\frac{2}{5},-143\}$

The natural numbers are $$

$($Use a comma to separate aliswers as needed.$)$