What has many keys but can’t open a single lock?

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

You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

What has one letter and starts with an E?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

What kind of tree can you carry in your hand?

Which is the smallest number that you can write using all the vowels exactly once?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?