I want to know the answer to the following question:
What number was the Tironian note visually similar to?
All the background I'm provided with is that "The remaining 20 Latin letters were supplemented by four more: ⟨æ⟩ (æsc, modern ash) and ⟨ð⟩ (ðæt, now called eth or edh), which were modified Latin letters, and thorn ⟨þ⟩ and wynn ⟨ƿ⟩, which are borrowings from the futhorc.". Is that enough to answer the question?
Answer: yes