What is the next number in the series?

15 29 56 108 208 ?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

What has hands, but can’t clap?

What do you answer even though it never asks you questions?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

What is harder to catch the faster you run?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?