Easy Live

Chalkboard

30 points

471 Solves

Forensics

Easy

kcbowhunter ctflearn++ badge

Community Rating: 4.37 / 5

Solve the equations embedded in the jpeg to find the flag. Solve this problem before solving my Scope challenge which is worth 100 points.

math.jpg

First 10 Solvers

Rank Username
1 Fixed
2 ebouteillon
3 lenoci
4 SketchyDuck
5 xvenom
Rank Username
6 Stalkerangel
7 ApToX
8 evrest
9 pr0ctf
10 Programmer14PL

    • kcbowhunter ctflearn++ badge

      Impressive to do it manually! I think Wolfram has a website which does mathematics.

  • SeeTeeEff

    each equation returns and x and y value right? are we providing x from the first equation and y from the second? or should each equation resolve to a single integer?

    • kcbowhunter ctflearn++ badge

      There are two equations and two unknowns, so you have to solve the system of equations to solve for x and y. You can't solve just one equation or x or y, you have to solve them together. You can do basic linear algebra http://mathsfirst.massey.ac.nz/Algebra/SystemsofLinEq/EMeth.htm or https://www.youtube.com/watch?v=cz6UmZLWgEw or use Wolfram: https://www.wolframalpha.com/examples/mathematics/algebra/equation-solving/

    • kcbowhunter ctflearn++ badge

      Thanks, glad you enjoyed it. I have a 100 point challenge called Scope which also has a 2x2 set of equations to solve, and the solution is used to decrypt instructions for solving the challenge.

  • kuroneko

    i do it manually and it took me a while to remember it. but i really love it

  • Londek

    Nothing hard, primary school math

  • hishiro ctflearn++ badge

    Thank you, Now i have some new exercise to warm up my student :D

  • leakpWn

    https://www.wolframalpha.com/input/?i=3x+%2B+5y+%3D+31%2C+7x+%2B+9y+%3D+59

  • 00war10ck00

    https://www.mathpapa.com/equation-solver/ Easy one...