Question

Four resistors 1 ohm, 2 ohm, 3 ohm, 4 ohm, 5 ohm are connected in and after series ward in parallel.calculate the combined resistance in each case.

Answer 1

after saying "huh?" I figured you must have meant

connected in series, and afterward in parallel
Recall that the equivalent resistance is
series: R = 1+2+3+4+5
parallel: 1/R = 1/1 + 1/2 + 13 + 1/4 + 1/5