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How to Solve Level 21 in I’m Not a Robot

Lim How Wei
September 19, 2025

I’m Not a Robot is a Captcha puzzle browser game created by Neal Agarwal.

Players must go through multiple levels to “prove” they are human.

These levels include tasks like deciphering distorted letters, choosing items, or solving patterns.

As the game progresses, the tasks get more difficult and absurb which tests your IQ.

In this guide, you’ll learn how to solve level 21 in I’m Not a Robot Game by neal.fun (CRAFTCHA walkthrough guide and answer).

How to Solve Level 21 in I’m Not a Robot

Level 21 I'm Not a Robot Diamond Pickaxe

Level 21: Select items to craft a Diamond Pickaxe.

Solution:

  • 2x Oak Logs > 8 Oak Planks
  • 8 Oak Planks > Right-click to split
  • 4 Oak Planks above > 4 Oak Planks below > 16 Sticks
  • 3 Diamonds horizontally on top > 2 Sticks in the middle below > Diamond Pickaxe

Explanation: Crafting a Diamond Pickaxe is based on the game, Minecraft, where you’ll need 2 Sticks and 3 Diamonds to craft it.

Further reading

How to Solve Level 20 in I’m Not a Robot

How to Solve Level 19 in I’m Not a Robot

How to Solve Level 18 in I’m Not a Robot

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Lim How Wei

Lim How Wei is the founder of followchain.org, with 9+ years of experience in Social Media Marketing and 5+ years of experience as an active investor in stocks and cryptocurrencies. He has researched, tested, and written thousands of articles ranging from social media platforms to messaging apps.

Lim has been quoted and referenced by major publications and media companies like WikiHow, Fast Company, HuffPost, Vice, New York Post, The Conversation, and many others (source: link profile). One of his articles about the gig economy was quoted by Joe Rogan, who hosts The Joe Rogan Experience (arguably the most popular podcast in the world), in the This Past Weekend podcast by Theo Von.

In his free time, Lim uploads personal finance videos on his YouTube channel, Lim Finance, to guide others on their financial journey. He also creates gaming guides, walkthroughs, solutions, and tips for the games he plays, helping players with their progression.