No, it is not.
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101 is a rational number. It can also be written as 101/1
Sqrt(25) is -5 or +5, both of which are rational.
Yes well at least that is what is what ive learnt
No, it is not. It is an irrational number we often use the term "radical two" to name.
The square root of any negative number is not even a 'real' number. It's called 'imaginary', because there's no number you can multiply by itself to get a negative number. The square root of 101 is irrational.