What does this below rebus puzzle mean?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

When can we add 2 to 11 and get 1 as the correct answer?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

How can a man go eight days without sleep?

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

what does this picture(rebus) riddle means ?

Can you find the missing piece of the Porsche?