I am lying and I always lie. Tell me whether I am lying or telling the truth.

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?

I have branches, but no fruit, trunk or leaves. What am I?

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?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

People make me, save me, change me, raise me. What am I?

What jumps when it walks and sits when it stands?

What goes through cities and fields, but never moves?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.