Which city is three-fifths chick two third cat and 50% goat?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

I look at you, you look at me I raise my right, you raise your left. What am I?

Can you find the missing piece of the Porsche?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Five thieves looted a bank and they ran away in a car. The bank staff informed the police and they began the search of their car in their jeep. They found them on a road and chased them eventually catching them. The light that is used to fill the number plate was broken on the thieves' car. Also, the headlights of the jeep police were not working. How were the police able to catch the thieves then?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?