Question

If R number 1=7 and R number 2 =5 what is the resistance of the circuit? Answers are 5, 7,12,or 35

Answer 1

If R1 and R2 are in series, then R circuit is 12.

If in parallel, then (1/R) = (1/R1) + (1/R2) = about 3 so they must be in series. Check that out to make sure.