What invention serves to see through the walls?

Answer

Window.

What invention serves to see through the walls?

Trend Riddles

The more look you at it, the less you see.
What is it?

What 5-letter word typed in all capital letters can be read the same upside down?

Where do horses go when they get sick?

I come knocking but once, embrace me when i appear, for i may not come again.
What am I?

You just smashed open your piggy bank and counted 55 coins totaling $10.00.
There are more nickels than pennies, more dimes than nickels, and more quarters than dimes.
How many of each coin is there?

Latest riddles

I'm under your face,
I'm outside your mind;
a biological case,
pressure brings pain sometimes.
What am I?

When does 15 ever go equally into 24?

If:
8809 = 6
7111 = 0
2172 = 0
6666 = 4
1111 = 0
3213 = 0
7662 = 2
9312 = 1
0000 = 4
2222 = 0
3333 = 0
5555 = 0
8193 = 3
8096 = 5
7777 = 0
9999 = 4
7756 = 1
6855 = 3
9881 = 5
5531 = 0

Then, 2581 = ?

Three friends check into a motel for the night and the clerk tells them the bill is $30, payable in advance. So, they each pay the clerk $10 and go to their room. A few minutes later, the clerk realizes he has made an error and overcharged the trio by $5. He asks the bellhop to return $5 to the 3 friends who had just checked in. The bellhop sees this as an opportunity to make $2 as he reasons that the three friends would have a tough time dividing $5 evenly among them; so he decides to tell them that the clerk made a mistake of only $3, giving a dollar back to each of the friends. He pockets the leftover $2 and goes home for the day! Now, each of the three friends gets a dollar back, thus they each paid $9 for the room which is a total of $27 for the night. We know the bellhop pocketed $2 and adding that to the $27, you get $29, not $30 which was originally spent.
Where did the other dollar go?

The person who made me does not want me , the person who bought me does not need me, the person who
needs me does not know it, what am I?