What country can make you shiver?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

I have an eye but still cannot see.

Who am I?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

I shave every day, but my beard stays the same. What am I?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?