Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

I know a nine-letter word having only one vowel.
Do you ?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

Three cars are driving on a track that forms a perfect circle and is wide enough that multiple cars can pass anytime. The car that is leading in the race right now is driving at 55 MPH and the car that is trailing at the last is going at 45 MPH. The car that is in the middle is somewhere between these two speeds.
Right now, you can assume that there is a distance of x miles between the leading car and the middle car and x miles between the middle car and the last car and also, x is not equal to 0 or 1.
The cars maintain their speed till the leading car catches up with the last car and then every car stops. In this scenario, do you think of any point when the distance between any two pairs will again be x miles i.e. the pairs will be x distance apart at the same time ?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

John was piloting a plane behind a car but was never able to overtake it. Why?

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

Find the Goldfish below the given Image.

The peacock is a bird that does not lay eggs. How do they get baby peacocks?