Connecting resistors in series and parallel

Question 1

In which circuit should we connect the resistors in if we want a higher amount of resistance?
Formula?

Answer 1

Whenever, we look for a higher amount of resistance in a circuit, we need to connect the resistors in series.
Formula - Rt= R1+R2 +…….., unit is ohm

Question 2

In which circuit should we connect the resistors in if we want a less amount of resistance? Formula?

Answer 2

Whenever, we need to have a less amount of resistance we need to connect the resistors is parallel.
Formula- 1/Rt= 1/R1 + 1/R2 +…………