A Quiz

My friend Prashant Dave sent this SMS to me:

Challenge 4 u.. Solve this IQ test asked in Infosys..

5+3+2=151012

9+2+4=183662

8+6+3=482466

5+4+5=202504

Then,

7+2+5=??????

To solve this:
Consider first expression:
5+3+2=151012

Looking at it for some time its easy to figure our first 4 digits:
5*3=15
5*2=10

1510 are the first 4 digits.
But what about next 2 digits “12”. Tried many things. Then realized this:
Left hand side is: 5+3+2

Then (5+2)*3 = 21

Same for next expression: 9+2+4=183662

(9+4)*2 = 26

Now just reverse these numbers 21 and 26. So the first expression becomes: 5+3+2=151012 and second: 9+2+4=183662

Apply this for rest of the expressions. So answer for the last expression is:
7+2+5=143542

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