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In the correctly-worked addition problem below, which of the following
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29 Nov 2021, 05:45
29 Nov 2021, 05:45
Expert Reply
00:00
Question Stats:
80% (01:26) correct
20% (01:20) wrong based on 20 sessions
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In the correctly-worked addition problem below, which of the following could be the digit A?
AB
+6D
_____
152
I. 7
II. 8
III. 9
(A) II only
(B) III only
(C) I and II only
(D) II and III only
(E) I, II, and III
AB
+6D
_____
152
I. 7
II. 8
III. 9
(A) II only
(B) III only
(C) I and II only
(D) II and III only
(E) I, II, and III
Re: In the correctly-worked addition problem below, which of the following
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15 Dec 2021, 03:18
15 Dec 2021, 03:18
Expert Reply
Re: In the correctly-worked addition problem below, which of the following
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09 Jan 2022, 12:03
09 Jan 2022, 12:03
1
For the tens digit, If A = 7, then 7+6 = 13, which invalidates part I because the highest B and D could add up to is 12. Therefore, it is impossible to carry over a 2 to create 15. So, eliminate answer choices C and E, which have part I as an answer.
If A = 8, then 8+6 = 14. B + D could be 6+6=12. If you carry over the 1, then 14 becomes 15, which validates part II.
If A = 9, then 9+6 = 15, which validates part III.
Thus, answer choice D (II and III only) is the correct answer.
For the units digit, in order to get 2, A + B could be 2+0, 0+2, 6+6, 8+4, 4+8
If A = 8, then 8+6 = 14. B + D could be 6+6=12. If you carry over the 1, then 14 becomes 15, which validates part II.
If A = 9, then 9+6 = 15, which validates part III.
Thus, answer choice D (II and III only) is the correct answer.
For the units digit, in order to get 2, A + B could be 2+0, 0+2, 6+6, 8+4, 4+8
