Why Wine Glass Stem is so long?

Forwards I am heavy, backward I am not. What am I?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Can you decipher the two rows to find the hidden word?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

How many times can you subtract the number two from the number fifty?

What you cannot hold but it is yours?