I am white when I am dirty, and black when I am clean. What am I?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

How many words can a pen with half refill write?

What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

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

Can you name four days which start with the letter 'T'?

What is the largest number you can write with just 3 digits?

Sachin bought a car with a strange 5 digit numbered plate.The water image of the number is 78633 more than my car number. All the digits of car number are distinct.

What is the original number on number plate?

O_er_t_o_

Complete the missing letters of the given word.

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6