Topic: Riddles and Brain-Teasers for Bitcointalk Members (Newbies – Members) - page 3. (Read 1576 times)

This is an old riddle from the USSR for students who go to technical institutes to become an engineer.



A is the lowest point of the left circle. The line begins from it.
B - The highest point of the right circle. This is the end of the line.
The area that is shaded in red is equal to 10 square meters, the area that is shaded in blue is equal to 80 square meters.
What is the area of one circle?

OK, so the amount of coins we send and the location of the receiver doesn't have any affect on the required transaction fees. The mining fees are determined based on the size of the transaction. In that case, what would be the ideal type of bitcoin transaction (size-wise) that Ivan can send to his brother, and what would a bad one look like or be made up of?

Bitcoin transactions are essentially messages, like email or chat messages. Each message is digitally signed using cryptography and verified by the Bitcoin network.
Almost all transactions include transaction fees, which are paid to the bitcoin miners to secure the network. Transaction fees are calculated based on the size of the transaction rather than the amount of bitcoin that is being transferred or the distance it must "travel". In other words, it makes no difference whether you send $ 10 or $ 10000 - your transaction fee can be the same.

Bump

Riddle #7

Ivan is from Croatia. His younger brother Igor studies abroad in Canada. Ivan wants to send Igor a $100 gift in bitcoin, but he is worried. Canada is far away, and the transaction will inevitably include international transaction fees, he thinks. Ivan hesitates whether or not bitcoin is the best payment method to use and thinks the more coins you spend, the bigger the fees will be.

Can you help Ivan to figure out how bitcoin transactions work and how the fees are determined?

@mersal
Riddle solved!

That's correct. A dust attack is an attempt to try and identify a user and discover other coins that belong to him. If a received dust transaction gets consolidated with other UTXO's and sent to an exchange where the customer performed KYC, it's possible to find the real identity of the person behind certain addresses. The worst thing that can happen is that the government and other 3rd parties (potentially malicious ones) will know how much bitcoin Brian has. 

Receiving dust transactions can't result in your wallet getting hacked or your coins being stolen. The easiest way to deal with dust transactions in Electrum is through the Coins tab. You just right click on the input, and click on freeze coin or freeze address. If the dust was sent to an address that already contains coins, freezing just that dust input would allow the user to spend the remaining UTXOs from that address. Freezing the whole address wouldn't make that possible. 

I exactly know what to do but maybe I am not that good at a complete explanation, okay I will try it.

Brian needs to ensure that the received address should not link to all the addresses in his wallet because the reason why dust attack happens just to find the identity of an individual by linking the addresses together via exchange or any other source they have but anyway dust attack is only harmful for our privacy but it not going to give access of our funds to the hackers/scammers.

Electrum allows the UTXO freezing option which means we can opt for an input to be nonspendable so the funds will never move out of that address so it will not link to any other addresses of his wallet.

To freeze an address : View ==> show coins ==> addresses ==> select the address which received the dust amount ==> freeze

Riddle #6

Brian is a regular bitcoin user. He is often paid in crypto for the services he offers and is happy when he sees his wealth increase. Just like many other people, his wallet of choice is the user-friendly and straightforward Electrum client

One day as he was going over all the received transactions for that week, he noticed that an unknown address sent him around 600 satoshis two days ago. He knows that the sending address doesn't belong to any of his friends or clients, and the received amount is too small for a service that he offers.

Brians starts doing some research, and he learns about dust attacks and their dangers. He doesn't want anyone to infringe on his privacy or realise how much bitcoin he owns, and he needs to find a way to deal with this dust attack.


Why was that small amount of bitcoin sent to him, and what can he do to ensure he never spends those coins?

Oops, I missed the task! )
And the main thing is that I knew the answer to this question for sure.
I will also add, when you delete a message, for example, from viber, then a mark remains that something has been deleted. There is not even such a mark in telegram. Not a trace remains. I may be wrong, but earlier it was still possible to remove yourself from the contacts of another person. Now I don't see this function.

There are a few ways to spot a fake admin or support member of a Telegram group. Looking for the star icons is one of the ways. Telegram admins have special tags next to their names. These tags will say owner, admin, staff, etc. Some groups mention the names of all their staff in the group description or the pinned post.

The way to spot a scammer is by looking at the username in his profile. Scammers try to impersonate the admins by using the same or similar name to that of the admin. If the admin is Pmalek, the scammer will use Pnalek or Pmaiek or something similar. Because the scammers can't use the identical usernames of the people they are trying to impersonate, they often leave the username field empty and fill out the Bio field with the correct username instead. So if you spot someone named Binance Official Support, check if that is indeed the username or the Bio of the profile.

Another thing to keep in mind. A scammer who impersonates admins in the Binance Telegram group, wont be a member of that group. Why? Because he will be discovered, reported, and banned. They follow the discussions without joining the groups because Telegram allows you to contact anyone via PM even if you are not part of the same group. If you have joined a Binance Telegram group, and you are talking to a real admin of that group, it's only logical that both you and that admin are members of the group and have that group in common. You can test that with any group by clicking on someone's user profile and checking the field that shows which groups you have in common. When you do that with a scammer, you will notice he is not a member of the group where you seek help.

And always remember that admins won't PM you first even if you seek help. They will talk to you in public, and suggest that you PM them in case you need help.

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Marvelman is correct. Any party can delete the complete PM exchange between two users. Telegram is not suitable to engage in trades because any proof you might have on the other party, can be deleted at anytime. That is what Lisa did when she received the money from Marcus. There is no such thing as a wallet activation fee or exchange account activation. Anyone who request such things is trying to scam you. 

Well, that is easy. When we go to group members area, we should look for the star mark indicating the group administrators.
Just because someone named their profile "Binance Official Support" does not mean that he is a member of the official staff. Anyone can name his or her profile whatever they want in Telegram.


Anyone in Telegram has the ability to delete any messages they send on both sides. We can also delete the complete chat history on both ends. So, unless Marcus made a backup or screenshot before that, deleting it from Lisa's side would wipe the entire conversation.


No, I don't believe that's common thing. If an exchange or online wallet requires payment of an activation fee, it is most likely a scam.

There are a few ways to differentiate a fake and genuine support member or admin of a Telegram channel. Marcus talked with someone whose profile said "Binance Official Support", but where was that written and how will he know that he is talking with a staff/admin of the channel?

Good. She deleted the conversation on her end, but will Marcus still have access to the Telegram chat on his end?

Is it a common thing to pay activation fees for accounts on crypto exchanges or wallet software?

Telegram is notorious for a high number of scams, ranging from phishing sites to impersonation. Anyone can set up a fake Telegram account and post anything they want. It's difficult to say whether the person offering assistance is legit or not.

What I believe happened here is that Lisa is not a Binance support staff member and she tricked Marcus into paying a fake activation fee.
After that, she deleted the entire conversation from the Telegram app to cover her tracks.

I'm not sure if Marcus' account will be activated after this, but Marcus will have to find that out for himself through official support channels on the Binance platform.

No problem mate, you are welcome.

These are general problems and questions that have been raised many times by various members of the community. Whoever has been on the forum for a few months/years has either read about or experienced problems related to seeds, recovery phrases, wallets, scams, etc. Most of them know the answers to these riddles. That's why this is an (unsuccessful) attempt to get some of the youngsters to say something meaningful and carry out some easy research.   

OK I get your point right op, until the time is manured for every user that wants to partake because I taught initially when I saw the subject of these post that the question is general to everybody, thanks for clarification

Can you at least make an effort to read the entire thread, particularly the posts from Pmalek? He started this entertaining game to help younger members advance on the forum while also teaching us all something useful.

You keep answering and quoting riddles that have been solved long ago instead of trying to understand and solve the most recent one posted.

Yes, this was intended for users of Newbie, Jr. Member, and Member ranks. If no one from these groups provides the proper answers, I open the thread for all other ranks after a few days. There isn't a set timeframe and the lower ranks found the answers to all the previous riddles. In just one case I had to open the thread for everyone, but even then, the answer was provided by a member of the targeted rank.

She asked mike if he wrote down the private key given to him while he was creating his hardware wallet account

While his pin could not work even though he had his pin is because he misplaced his private key

Crypto can't loss from hardware wallet he only mosplaced his assess to the wallet

Yes there Crypto was there

I have seen that this question is basically meant for newbies who are new forum user depending on the rank according to op, I will like to know when the question will be open generally, from my understanding any user who is beyond junior member position and member position is not entitle for any reward based on my view, when can full member, senior member, hero member and legendary member I notice the proper time to render suggestions???

She didn't purchase bitcoin rather she purchased bitcoin cash. she transfered the bch to the wrong address so the coin  hanged. She made the mistake of sending Bch to a btc wallet address