Question

two resistors of 10 ohm and 15 ohm are connected in series to a battery of 6 volt how can the values of current passing through then be compared

Answer 1

the current passing is 4.2 ampere

Answer 2

since the resistors are connected in series, the current will be the same through both the resistors however it should be noted that potential difference would be different across both the resistors. now, the current I = v/r
r is the total resistance, since in series, r total will be 10 + 15 = 25ohms.
I = 6/25 ampere