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iam confused plz help........
1 Answers
Find sum of digits of D.
Let A= 19991999 ,
B = sum of digits of A,
C = sum of digits of B,
D = sum of digits of C.
(HINT: A = B = C = D (mod 9))
Let A= 19991999 ,
B = sum of digits of A,
C = sum of digits of B,
D = sum of digits of C.
(HINT: A = B = C = D (mod 9))
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