What goes up but never comes down?

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

What number comes next in this sequence:
7 8 5 5 3 4 4 _

What can jump higher than a building?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

Look at the picture and find out which square is not linked with any of the other squares.

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

When we see 2 but call 10?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

What has many teeth, but cannot bite?