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 MOD Value ?

FF clears at $Q_{3}Q_{2}Q_{1}$ =  110 

So mod value is 6 ...??

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sorry for my comment above i have not considered positive edge triggered clock.THe correct solution will be this->as positive edge triggered clock is applied we have following conditions->

-> Q1 will change every time

-> Q2 will change only when Q1 changes from 0 to 1.

->Q3 changes only when  Q2 changes from 0to 1.

so we will get this table..

clock Q3 Q2 Q1 t3 t2 t1 clr
0 0 0 0 1 1 1 1
1 1 1 1 1 1 1 1
2 1 1 0 1 1 1 0(clr is active)
3 0 0 0 1 1 1 1

so it is a down counter and only 3 states are possible.

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