What four weights can be used to balance from 1 to 30 pounds?

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?

A bomb exploded in a room full of married couples and no one died. How?

I have branches, but no fruit, trunk or leaves. What am I?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

What does this rebus riddle mean?

Find out the number of circles in the given picture having Illusion

how come the second man dies?

Can you write down eight eights so that they add up to one thousand?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den