# Pattern recognition problem having figures

The following pattern was given to me by one of my friend:
If
,
and

then, what is the value of

My Thoughts:
From the first figure we conclude each clock is represented by its equivalent hour value,
so $$9+9+3=21$$ From second figure we conclude each calculator is represented by its sum on its display,
so $$10+10+10=30$$ but third figure is little bit tricky with the consideration of fourth figure;
I think each bulb is decoded as two digit value with the following rules:
Unit's digit $$\to$$ number of arrows on the bulb , and
Ten's digit $$\to$$ number of bulbs
so, $$15+15-15=15$$ $$\therefore$$ answer is

$$9+9*34= \boxed{315}$$

Is there any better decoding of figures exists? or my logic is the best??

• Do you really need to go to such complexity with the light bulbs or can you just say each radiating line is worth 3 points, making the three 4-line bulbs together (i.e. 12 radiating lines) worth 12x3=36? That would be simpler.
– Stiv
Jul 13 '20 at 10:58