If you are provided a set of resistances, 2   Ω ,   4   Ω ,   6   Ω…
- and are in parallel with and in series
- and are in parallel with and in series
- and are in parallel with and in series
- and are in parallel with and in series
Solution

We can arrange the circuit like above now on solving we get a simplified circuit,

here, both the resistance are connected in series then resultant resistance will be,
, in the other case we can not get this result.
Asked in: JEE Main 2021 (26 Aug Shift 2)