PDF chapter test TRY NOW

Classify the following numbers as rational or irrational with justification :
 
1. \(\sqrt{196}\) is
 
2. \(3\sqrt{18}\) is
 
3. \(\sqrt{\frac{9}{27}}\) is
 
4. \(\sqrt{\frac{28}{343}}\) is
 
5. \(-\sqrt{0.4}\) is
Answer variants:
is an irrational number
a rational number