Replace the question mark with the number below given a simple math problem.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

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

A man is walking down a road with a basket of eggs. As he
is walking he meets someone who buys one-half of his eggs
plus one-half of an egg.
He walks a little further and meets another person who buys
one-half of his eggs plus one-half of an egg.
After proceeding further he meets another person who buys
one-half of his eggs plus one half an egg. At this point, he
has sold all of his eggs, and he never broke an egg.
How many eggs did the man have to start with?

I have an eye but still cannot see.

Who am I?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

What two things can you never eat for breakfast?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?