Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

What does the below rebus riddle means?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

There is a place where if I stand up straight, I will still be considered sideways.

O_er_t_o_

Complete the missing letters of the given word.

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.

What has many teeth, but cannot bite?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Which alphabet letter is a question?