IT HAS TO BE 18.

8 PLUS 1 = 9

9 TIMES 2 = 18

WHICH IS THE ONLY NUMBER THAT 

IS TWICE THE SUM OF ITS DIGITS?

A. 18

B. 124

C. 27

​D. THERE IS NO SUCH NUMBER

LIKE I SAID -- USELESS INFORMATION (SMILE)

THE ANSWER IS BELOW

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