Number Puzzle : 6 + 4 = 210 9 + 2 = 711 8 + 5 = 313 5 + 2 = 37 7 + 6 = 113 9 + 8 = 117 10 + 6 = 416 then, 15 + 3 = ???

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Question :

numbers-1336520__180

If,

6 + 4 = 210

9 + 2 = 711

8 + 5 = 313

5 + 2 = 37

7 + 6 = 113

9 + 8 = 117

10 + 6 = 416

Then,

15 + 3 = ???

Answer : Please provide the answer in comments below.

The number series is as shown below:
6+4 = (6-4)(6+4)=210,
9+2=(9-2)(9+2)=711
8+5=(8-5)(8+5)=313
So,
15+3=(15-3)(15+3)=1218
So answer is 1218.

 

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