picoCTF General Skills Guide

Warmed Up

Name: Warmed Up
Description: What is 0x3D (base 16) in decimal (base 10)?
Author: Sanjay C/Danny Tunitis
Tags: Easy, General Skills, picoCTF 2019
Challenge from: picoCTF 2019
Hints:
1. Submit your answer in our flag format. For example, if your answer was '22', you would submit 'picoCTF{22}' as the flag.

Theory

According to the description, to get the flag we have to convert the hexadecimal `3d` to decimal. This is pretty easy because we can just use any hex to decimal converter online.

Solution

Let's input the 3d to a hex to decimal converter, we'll remove the 0x part because the part that defines that it's hexadecimal is not needed:

HEXADECIMAL TO DECIMAL (online converter)

INPUT: 3D

OUTPUT: 61

Now let's put it in the usual pico flag format and submit it:

Submit Flag: picoCTF{61}

Check: Correct!

There we go! That's the flag.

I rated this level as "good"! :3