Website: https://ctf.hacktivitycon.com/

Problems

1. Read The Rules Answer: Check the page source code.

   flag{90bc54705794a62015369fd8e86e557b}
   

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1. Six Four Over Two Answer: 64/2 = 32. Decode by Base32.

   flag{a45d4e70bfc407645185dd9114f9c0ef}
   

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1. Bass64 Answer: It's an ASCII art. Decrease font size to get the string. Then Base64 decode it.

   string: IGZsYWd7MzVhNWQxM2RhNmEyYWZhMGM2MmJmY2JkZDYzMDFhMGF9
   flag{35a5d13da6a2afa0c62bfcbdd6301a0a}
   

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1. Pimple

Answer: Since it's a GIMP file, open it using GIMP. Keep browsing the image, get the flag eventually.

flag{9a64bc4a390cb0ce31452820ee562c3f}

Lol, I only solved three. Should have come with more preparation. GG.