Answer :
what you do is divide the second number by the first number and whichever one has a different difference is the odd one out
42÷6=7
7÷1=7
28÷4=7
14÷2=7
50÷7≈7.14
So that means the odd ratio out is 7:50
42÷6=7
7÷1=7
28÷4=7
14÷2=7
50÷7≈7.14
So that means the odd ratio out is 7:50