What is so fragile that saying its name breaks it?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What is the next number in the series?

15 29 56 108 208 ?

I am sure no one can have two things for dinner. what are they?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

I always drive my customer away.

Who am I?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

Which alphabet letter is a question?