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!!!

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

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

How do you go from 98 to 720 using just one letter?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

Which five letter word can be added at the end of below word to form a
valid word?

> Pin
> Check
> Boiling
> View

If 1+9+8=1, what is 2+8+9?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.