Puzzle of The Day #11
Solution:-
As you go down, subtract the sum of each digits in each number from itself to give
the next number.
123- 6 (1+2+3 = 6 ) = 117
117- 9 (1+1+7=9 )= 108
108- 9 (1+0+8 =9 ) = 99
99 - 18 (9+9 =18 ) = 81
So answer is 81
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