Hi everyone! This is my first post and visit to The Physics Forum. I was unable to insert attachments so please refer to the link below:

https://sub.allaboutcircuits.com/images/00123.png

As you all can see, the circuit is has 2 parallel sections. Let's say we look at the first pair(100 and 250 Ohm) and we want to calculate the current across 100 and 250Ohm resistors. To first calculate current across R1 resistor, I use I=V/R (24/100= 0.24A). The total current is 0.12A, total voltage is 24V, and total resistance is 198.7Ohm. Another way to calculate current across R1 is using Current Divider Rule which is I1=250/(250+100) *0.12=0.09A. In this case, I don't understand why I can't use Ohm's Law to get current across R1 BUT in a 2 branch parallel circuit only I could apply both CDR and Ohm's Law.

Please Help