Digits - countdown numbers game

[T4tomo]

#Summle #1414: 4/4
⚪ 🔹 ⚪ = 🟡
🟡 🔹 ⚪ = 🟡
🟡 🔹 ⚪ = 🟡
🟡 🔹 ⚪ = 🟢
#Summle hard #1414: 5/5
⚪ 🔹 ⚪ = 🟡
⚪ 🔹 ⚪ = 🟡
⚪ 🔹 ⚪ = 🟡
🟡 🔹 🟡 = 🟡
🟡 🔹 🟡 = 🟢
#Summle extreme #1414: 5/5
⚪ 🔹 ⚪ = 🟡
⚪ 🔹 ⚪ = 🟡
⚪ 🔹 🟡 = 🟡
🟡 🔹 ⚪ = 🟡
🟡 🔹 🟡 = 🟢
and I found hard the easiest, and the easy the hardest (well to get the 4) !! its weird, some you just spot and some you don't. I tend to spot the direct pairs of factors, but struggle more on the get to a big number plus /less a bit