Advanced Challenge

Analyze the patterns and solve the equations!

1) Solve
4:5=12:?=
2) Solve
10:10=50:?=
3) Solve
5:10=20:?=
4) Solve
5:10=?:50=
5) Solve
7:4=?:12=
6) Solve
1:10=3:?=
7) Solve
6:1=?:4=
8) Solve
4:10=12:?=
9) Solve
4:9=?:45=
10) Solve
8:8=?:40=
11) Solve
3:1=6:?=
12) Solve
10:4=?:20=
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