Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

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?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

By what process could you make a 'Tea-Table' into food?

Imagine you are in a room with no windows or doors. How will you get out?

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

How many triangles are there on the puzzle below?

Spot what is wrong here in below Picture?

1. Where does Easter come from before Valentine's Day?

2. Do you know what is in the middle of Valentine's?

3. What did the lady bee say to the man bee on the occasion of Valentine's Day