Hello,

With less than a month for NTSE 2019, you must start revising all the topics done till now. Get all your queries solved from peers, relatives or teachers. Getting basics right is very important for any examination. Make notes of all important points you come across. You can refer them on the last day before exam. Don't panic. Stay calm. Take short breaks. Eat healthy, exercise and take proper rest. I'm sure you'll crack NTSE 2019. For more preparation tips, visit the link below:

https://school.careers360.com/articles/ntse-preparation

Yes you can definitely but you can solve all important sections and chapters first with goid weightages and for others just solve simple level solved problems from books. 

Make sure you devote 8 to 10 hours daiky becaus eonly then you can clear exam in 1 month. 

Syllabus shared below. 

https://school.careers360.com/articles/ntse-syllabus