Today, the crypto quiz will be about BITCOIN. Before you start answering the questions make sure that you have read the rules and the rewards section here. Now, let's go to the questions:
❔ What is the type of algorithm that bitcoin uses to validate a new block?
a) proof of stake
b) proof of work
c) proof of elapsed time
❔ How much does it take for a new block to be "mined"?
a) 5 minutes
b) 10 minutes
c) 60 seconds
❔ what are "ghost" bitcoins?
a) bitcoins sent to a invalid address so they are lost
b) bitcoins sent to a user called "ghost"
c) bitcoins that are unspent for a long time and probably this is due to the fact that their private keys are lost.