Why We Use Math Captcha in Our Telegram Group: An Admin’s Perspective

The Challenge We Face

As administrators of the Pine Ville @ AMK Telegram group, we’ve implemented a simple math verification system that new members encounter when joining. You might wonder why we ask you to solve “7 + 7” within 60 seconds. Let me explain why this seemingly simple step is crucial for maintaining our community.

Telegram Math Captcha Process

🔒 Telegram Math Captcha Verification Process

1
👤 User Joins Group
A new member clicks the invite link and joins "Pine Ville @ AMK" Telegram group
⬇️
2
🤖 Bot Detects New Member
The security bot (@sgfriedrice) automatically detects the new joiner and prepares verification
⬇️
3
🧮 Math Challenge Sent
Bot sends a private message with a simple arithmetic problem
🤖 @sgfriedrice
(7 + 7) @sgfriedrice, please send the solution to the arithmetic operation provided within the time amount specified to this group, otherwise you will be kicked. Thank you!
⏰ 60 seconds remaining
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4
💭 User Calculates Answer
New member solves the simple math problem: 7 + 7 = 14
⬇️
5
✅ User Responds Correctly
Member sends only the numerical answer within the time limit
14
✅ Verification Successful!
⬇️
6
🎉 Access Granted
User is verified as human and gains full access to participate in group discussions
⚠️ What Happens If You Don't Respond?

If no response is received within 60 seconds, or if the answer is incorrect, you will be automatically removed from the group. This protects the community from spam bots.

✅ DO

  • Send only the number: 14
  • Respond within 60 seconds
  • Double-check your math
  • Stay calm and focused

❌ DON'T

  • Send "The answer is 14"
  • Send "7+7=14"
  • Ask questions to the bot
  • Ignore the message

🛡️ This System Protects Our Community From:

Spam bots • Scammers • Fake accounts • Malicious links • Unwanted advertisements

The Bot Problem

Telegram groups, especially those with location-based names or public links, are constant targets for:

  • Spam bots that flood channels with unwanted advertisements
  • Scam bots that send malicious links or fake promotions
  • Content scrapers that collect member information
  • Automated accounts created to artificially inflate follower counts

These bots can join groups automatically and immediately start posting unwanted content, disrupting genuine conversations and potentially putting our members at risk.

How Our Math Captcha Works

When you join our group, our bot (@ngweihan) will send you a private message with:

  • A simple arithmetic problem (like “7 + 7”)
  • A 60-second time limit to respond
  • Clear instructions on what to do

This system works because:

  1. Bots struggle with context – Most spam bots can’t interpret and respond to simple math problems in real-time
  2. Human verification – Any real person can easily solve basic arithmetic
  3. Time pressure – The 60-second limit prevents automated systems from having time to process the request through external services
  4. Immediate filtering – It catches problematic accounts before they can post anything in the group

What New Members Should Do

If you see this verification message, here’s exactly what to do:

Step 1: Don’t Panic

This is a normal security measure, not a sign that you’ve done something wrong.

Step 2: Solve the Math Problem

  • Read the arithmetic operation carefully
  • Calculate the answer (in this case: 7 + 7 = 14)
  • Type only the number as your response

Step 3: Respond Quickly

You have 60 seconds to send your answer. The bot is looking for the numerical answer only.

Example Response:

Bot message: “(7 + 7) @ngweihan, please send the solution to the arithmetic operation provided within the time amount specified to this group, otherwise you will be kicked. Thank you! (60 sec)”

Your response: Simply type: 14

Common Mistakes to Avoid

  • Don’t overthink it – Just send the number, not “the answer is 14” or “7+7=14”
  • Don’t ignore the message – Failure to respond within 60 seconds results in automatic removal
  • Don’t send multiple messages – One correct numerical answer is all that’s needed
  • Don’t ask questions – The bot is automated and won’t respond to clarifications

Why This Method is Effective

This simple verification system has reduced spam in our group by over 95%. It’s a small inconvenience that provides massive benefits:

  • Protects member privacy by keeping out data scrapers
  • Maintains discussion quality by filtering out spam
  • Reduces admin workload by automatically handling verification
  • Creates a safer environment for genuine community interaction

 

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