Spot what is wrong here in below Picture?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Can you move 2 matchsticks to form four equal sized squares.

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

What brings you down but never up?

What does this below rebus puzzle mean?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?