Gentlemen. 1. The problem statement, all variables and given/known data Calculate the Thevenin equivalent resistance. 2. Relevant equations Rseries - Rtot = R1 + R2 + ... + Rn Rparallel - Rtot = 1/(R1^-1 + R2^-1 .... + Rn^-1) 3. The attempt at a solution As the picture shows, The second ohm-meter tells me 5.7 Ohms is the correct answer. I also have this answer given to me in the task. But I must be inept at calculating resistances, because I read it this way: Rth = (R1||R2) + R3 + (R4||R5) Rth = 2.045 + 5 + 3.6 Rth = 10,645 Obviously wrong. Even if I disregard R3, I get 5.6045 != 5.7.