What does this below rebus puzzle mean?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

A cricket has 6 legs, a squirrel has 4 legs and a spider has 8 legs.

In a local zoo, it was found that the total number of legs is 612. Also, there are equal number of each of the above animals/insects.

Can you find out how many animals are there in the zoo?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

What goes through cities and fields, but never moves?

What does below Rebus mean ?

esgg sgeg gegs gsge

What does below chemistry rebus means?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.

How do you go from 98 to 720 using just one letter?