What question can you never answer yes to?

I look at you, you look at me I raise my right, you raise your left. What am I?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

What work can one never finish?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

A man dies of old age on his 25 birthday. How is this possible?

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