1) 1/3=2/6=6/18=7/21
2) 2/5=6/15=10/25=28/70
3) 6/11=12/22=30/55=36/66
4) 13/7=26/14=130/70=104/56
5) 80/120=8/12=2/3=10/15
6) 30/48=5/8=10/16=15/24
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1) 1/3=2/6=6/18=7/21
2) 2/5=6/15=10/25=28/70
3) 6/11=12/22=30/55=36/66
4) 13/7=26/14=130/70=104/56
5) 80/120=8/12=2/3=10/15
6) 30/48=5/8=10/16=15/24