What word is pronounced the same if you take away four of its five letters?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

What Adam and Eve do not have but the rest of the people have?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

What has hands, but can’t clap?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Can you count the number of squares in the figure below?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

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?