What does the below rebus riddle means?

Solve the mathematical equation in the picture below.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?

Where do you go to learn how to make ice cream?

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

Can you find the key in the picture below?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?