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10 Nov 2018, 22:42
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Question Stats:
33% (02:04) correct
67%
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1) Let abcd be a general four-digit number and all the digits are non-zero. How many four-digits numbers abcd exist such that the four digits are all distinct and such that a + b + c = d?
(A) 6
(B) 7
(C) 24
(D) 36
(E) 42
(A) 6
(B) 7
(C) 24
(D) 36
(E) 42
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11 Nov 2018, 01:54
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Discussed here: let-abcd-be-a-general-four-digit-number-and-all-the-digits-are-non-zer-234985.html
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