Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

what does the below math rebus puzzle mean?

What can you catch but never throw?

Can you make a fire with just a single stick?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

How many squares, of any size, can you find on this chessboard which do not contain a Rook?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744