A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

What number do you get when you multiply all of the numbers on a telephone's number pad?

Can you make a fire with just a single stick?

Can you start the fire using two pieces of wood?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

By adding four matchsticks, can you divide the square shown in the picture into two equal parts?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10