Analysis by assumed diode states

[Yaaaldi]

Homework Statement

I'm having a hard time trying to figure out where to start. I know I have to assume the diode states and then calculate if the assumptions work within the circuit.

The Attempt at a Solution

None as yet because I'm never sure where to start on these circuits when they are drawn in this way. Could someone give me a nudge in the right direction, or a general approach to these problems?

Thanks

 

[skeptic2]

Start by calculating the voltage across each resistor.

 

[berkeman]

In addition to skeptic2's hint, I'd be inclined to start by assuming that only the 2 diodes with the biggest voltage difference between them are on, calculate the middle node's voltage, and then go to the next highest voltage difference diode and see if it is on, and so on...