I want to know the answer to the following question:
How many vacuum tubes did the Colossus Mark I contain?
All the background I'm provided with is that "Colossus Mark I contained 1500 thermionic valves (tubes), but Mark II with 2400 valves, was both 5 times faster and simpler to operate than Mark 1, greatly speeding the decoding process.". Is that enough to answer the question?
Answer: yes