Looks so another silly mistake!!
Pls help !
"NUMB" Line !
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This is how I would approach to this one
LCM: 5 and 7 = 35
5 apart: 5,10,15,20,25,30
7 apart: 7,14,21,28
combined parts: 5,7,10,14,15,20,21,25,28,30
MIN DIFF in parts = 1 {sets of 14,15; 20,21}
ans: 1/35
LCM: 5 and 7 = 35
5 apart: 5,10,15,20,25,30
7 apart: 7,14,21,28
combined parts: 5,7,10,14,15,20,21,25,28,30
MIN DIFF in parts = 1 {sets of 14,15; 20,21}
ans: 1/35