What is so fragile that saying its name breaks it?

Which part of London exists in France as well ?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

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

What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

Can you find the company name in the pictogram below?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

Why is it very easy to weigh a fish?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?