What does the below rebus riddle means?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

How many letters are in the alphabet?

Can you find the company name in the pictogram below?

How many times can you subtract the number 5 from 25?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?