Nobody in this thread is wrong, the answer is [1,9] because both can be proven. The confusion in this thread comes from most people not understanding the function of parentheses’ in the first place, check below.
We have two ways of “working out” the following basic equation:
5/2*3 = 7.5 <doing “5/2” first is the first way
5/2*3 = 0.83 (recurring) <doing “2*3” first is the second way
As you can see working out different parts first gives different answers, hence why we use parentheses as an indictor of which “part” should be worked out first. What’s also important to remember is that brackets are a multiplicative function.
Look at the above equations again, If we wanted a person to do “5/2” first we would illustrate the equation as: (5/2)3, or, 3(5/2) and get the answer 7.5
Now, if we wanted a person to do “2*3” first we would illustrate the equation as: 5/(2*3) and get the answer 0.83
So given the quick examples above and what we know, if we illustrate the op’s question simplistically as [6/ 2*3], working from left to right the answer is 9, but the answer may also be 1 if we employ a diffrent order of calculation, therefore both answer are correct.