Your question is Identify Faulty Stack with One Weighing. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a scenario with 11 stacks of weights where exactly one stack contains faulty weights, each faulty weight is 1kg heavier, you may use a scale exactly once. How would you determine which stack is faulty?