There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

What brings you down but never up?

What is the last thing you take off before bed?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Can you count the number of matches in the picture below ?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What colour was the bear?

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