Number Systems ...

The value of $$[1^{-2} + 2^{-2}+3^{-2}] \times 6^2$$ is ______.

A rational number between $$\sqrt {2}$$ and $$\sqrt {3}$$ is

After rationalizing the denominator of $$\dfrac {7}{3\sqrt {3} - 2\sqrt {2}}$$, we get the denominator as

$$\dfrac {1}{\sqrt {9} - \sqrt {8}}$$ is equal to

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Which one of the following is an irrational number?

Which of the following is not an irrational number?

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What is $$\sqrt{n}$$, if n is not a perfect square number?

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Which one of the following is an irrational number?

$$\sqrt{2}$$ is 

Multiply $$10^4$$ by $$10^2$$