Hi there,

If you want to check if the approach is right (not only for math but in general), I would avoid to use the “Does it sound right?” statement. It will give the impression you are not confident.

I would use an indirect approach instead. A possible way is to say “If that’s fine with you, I would move now to the next area, XYZ”. This will give the option for the interviewer to interrupt you if you have done mistakes and ask if you are sure about the math.

It is also good practice to do a double check on the numbers after you got the math result.

As bonus tip: never start the math doing the math (I know it is counterintuitive ;)). You should start presenting the structure for the math, then when you get approval from the interview, add the numbers. This will create an additional opportunity for the interviewer to confirm that the approach is correct.

Best,

Francesco