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And The Number Is?

What number should replace the question mark?

13   44   88   176   847   ?

The Answer Is:

1595

Reverse the digits and add it to the original to make the next number.

31 + 13 = 44; 44 + 44 = 88; 88 + 88 = 176; 671 + 176 = 847; 748 + 847 = 1595.


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