Write the set ${x : x is a positive integer and x^{2} < 40}$ in the roster form.

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Solution

Given: Set ${x : x is a positive integer and x^{2} < 40}$
$∴$ Required numbers whose square is less than 40 are $1, 2, 3, 4, 5, 6$
So, the given set in the roster form is ${1, 2, 3, 4, 5, 6}$

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