The number n is a whole number strictly between 10 and 20 (so n = 11, 12, ..., 19). For how many of these values of n is √n irrational?

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8. The whole numbers from 11 to 19 are 9 numbers. Among them only 16 is a perfect square (√16 = 4 is rational). The remaining 8 (11, 12, 13, 14, 15, 17, 18, 19) give irrational square roots.

The number $n$ is a whole number strictly between 10 and 20 (so $n = 11$ , 12, ..., 19).
For how many of these values of $n$ is $n$ irrational?

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More Class 9 Rational and Irrational Numbers practice

The number n is a whole number strictly between 10 and 20 (so n=11, 12, ..., 19).For how many of these values of n is n​ irrational?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Rational and Irrational Numbers practice

The number $n$ is a whole number strictly between 10 and 20 (so $n = 11$ , 12, ..., 19).
For how many of these values of $n$ is $n$ irrational?