terv-mommy
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- Jun 19, 2006
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This question appears as Section 2, number 3 of the Diagnostic Test in the McGraw-Hill SAT I study/practice book:
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"In the correctly worked addition problem below, each A represents the same digit. What is the the value of A?"
A3 + A5 + 2A = 157
(A) 1
(B) 2
(C) 3
(D) 4
(E) 6
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In the detailed answer to this question, it states as follows: "The answer is (D) 4. Since the ones column has only one A, it is easy to figure out its value from there. The only value for A that yields a seven in the ones column is 4."
Perhaps I am approaching this problem incorrectly, but right off the bat I add the three and the five in the ones column and get eight; to my mind, the only number that would then yield a value of 7 in the ones column would be a nine, which not only is not one of the answers, but would not fit with the rest of the problem even if it were! Please help if possible. Many thanks.
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"In the correctly worked addition problem below, each A represents the same digit. What is the the value of A?"
A3 + A5 + 2A = 157
(A) 1
(B) 2
(C) 3
(D) 4
(E) 6
-----------------------------------
In the detailed answer to this question, it states as follows: "The answer is (D) 4. Since the ones column has only one A, it is easy to figure out its value from there. The only value for A that yields a seven in the ones column is 4."
Perhaps I am approaching this problem incorrectly, but right off the bat I add the three and the five in the ones column and get eight; to my mind, the only number that would then yield a value of 7 in the ones column would be a nine, which not only is not one of the answers, but would not fit with the rest of the problem even if it were! Please help if possible. Many thanks.