Question

how can 3 resistors of resistance 2 ohm, 3 ohm, and 6 ohm be connected to give a total resistancee of i)4 ohm and 1 ohm

Answer 1

For 1 ohm they should be connected in parallel ,and to get a total of 4ohm 3 and 6 should be connected in parallel with series combination with 2ohm resistor.