Question

Hi anybody can help me with this brainteaser - You are in a notebook shop and you have a pen and 1 dollar bill. Nothing else -- no mobile phone. You need to write down 3 phone numbers of your 3 friends who are leaving. You can't write it on your body or clothes because it's raining heavily outside and the ink will get washed away. So you ask the shopkeeper if you can buy a notebook to write the 3 phone numbers down. But the shopkeeper says his cheapest notebook is $1.50. You are not allowed to ask money from anybody and you are not allowed to leave the shop until you write down the numbers and take them with you. You are not allowed to take anything with you out of the shop except whatever you brought with you and anything you buy from the shop but you can't buy anything from the shop because the shop only sells notebooks and the cheapest notebook is $1.50. How will you write down the 3 numbers and take them with you?

Answer 1

You could ask for a single paper

Answer 2

write the three numbers on the 1 dollar bill.