Answer:
4:10, 2:5
Step-by-step explanation:
We want to know what ratios are equivalent or equal to one another.
5:4 could be done with 10:8 not 10:6 so #1 is out
1:3 could be done with 1:3 not 1:4 so #3 is out
3:11 could be done with 6:22 and 9:33 not 9:22 so #4 is out
4:10 could be done with 2:5 and 8:20 so this is it.
In order to know what it could be done with you want to multiple the numbers by two. Or Divide by two.
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