Are the square roots of all positive integers irrational? If not, give an example of the square root of a number that is a rational number.

No, the square roots of all positive integers in not irrational. For example √9 = 3, √25 = 5, hence square roots of all positive integers is not irrational.

For example,

√25 = 5 is rational.

√36 = 6 is rational.

Hence, the square roots of positive integers 25 and 36 are not irrational. ( 5 and 6 respectively)

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