What does this below rebus puzzle mean?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

What happened when the wheel was invented?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Solve this riddle by finding the odd one out from the rest.

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair