<s>[INST] When I was 10 years old, my sister was half my age. Now that I am 40 years old, how old is my sister ? [/INST] When you were 10, you sister was 5 years old. Which means that she is 5 years younger than you. Now that you are 40, your sister is 35. </s><s>[INST] Good job, are there other riddles like this that you know? [/INST] Here are some other logic puzzles or riddles I can solve:

• The more you take, the more you leave behind. What am I? Footsteps.

• Spinning fast, arms outstretched, what am I? A windmill.

• The more of them you have, the less you see. What are they? Darkness.

• What gets broken without being held? A promise.

• What has a head and a tail but no body? A coin.

• What has 88 keys but can't open a door? A piano.

• What has a ring but no finger? A telephone.

• The more you lose, the more you gain. What am I? Weight.

Would you like me to try and solve another riddle or logic puzzle for you? </s>