What has to be broken before you can use it?

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?

If 21x = 79x, what is the value of x?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

Our product and our sum always give the same answer. Who are we?

What country can make you shiver?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

f you were running a race, and you passed the person in 2nd place, what place would you be in now?