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Re: If A B C are digits and AB not equals to 0, what is the val [#permalink]
08 Apr 2012, 13:32
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babusona wrote:
If A B C are digits and AB not equals to 0, what is the value of B? (1) AB +BA _______________ AAC
(2) A=1
I am confused on the OA. Consider following situations - 82 91 +28 +19 ____ _____ 110 110
Hence, B can be 2 or 1. So (1) is not sufficient.
In your first example A has different values, which cannot happen.
If A, B and C are digits and AB#0, what is the value of B?
(1) AB + BA = AAC --> A=1 (A can not be more than 1, as the sum of 2 two-digit numbers is always less than 200) --> 1B+B1=11C --> B=9 (B can not be less than 8 as 18+81=99, not a three digit number) --> 19+91=110. Sufficient.
Re: If A B C are digits and AB not equals to 0, what is the val [#permalink]
13 Apr 2012, 21:58
Bunuel wrote:
babusona wrote:
If A B C are digits and AB not equals to 0, what is the value of B? (1) AB +BA _______________ AAC
(2) A=1
I am confused on the OA. Consider following situations - 82 91 +28 +19 ____ _____ 110 110
Hence, B can be 2 or 1. So (1) is not sufficient.
In your first example A has different values, which cannot happen.
If A, B and C are digits and AB#0, what is the value of B?
(1) AB + BA = AAC --> A=1 (A can not be more than 1, as the sum of 2 two-digit numbers is always less than 200) --> 1B+B1=11C --> B=9 (B can not be less than 8 as 18+81=99, not a three digit number) --> 19+91=110. Sufficient.
(2) A = 1. Not sufficient.
Answer: A.
Hi what does AB#0 mean? what is the approach to solve such question in Data Sufficiency?
If A,B and C are digits and AB is not 0, what is the value [#permalink]
10 Dec 2012, 01:51
amitdgr wrote:
If A,B and C are digits and AB is not 0, what is the value of B ?
(1) AB + BA = AAC
(2) A = 1
I think the answer is D.
Statement 1: this statement has already been established as sufficient in the previous posts.
Statement2: A=1
AB +BA ------- AAC
In the above addition, observe the units place: (digit) B + (digit) A = (digit) C Now observe the tens place: (digit) A + (digit) B = (digit) A? -----> this means that a digit has carried over from the addition of the units digits. Now, because a digit has carried over, this implies that the digit A+B is a two digit number----> Now, the only way A+B or (1+B) will be a two digit number is if B = 9.
Re: If A,B and C are digits and AB is not 0, what is the value [#permalink]
10 Dec 2012, 01:58
Expert's post
geezer0305 wrote:
amitdgr wrote:
If A,B and C are digits and AB is not 0, what is the value of B ?
(1) AB + BA = AAC
(2) A = 1
I think the answer is D.
Statement 1: this statement has already been established as sufficient in the previous posts.
Statement2: A=1
AB +BA ------- AAC
In the above addition, observe the units place: (digit) B + (digit) A = (digit) C Now observe the tens place: (digit) A + (digit) B = (digit) A? -----> this means that a digit has carried over from the addition of the units digits. Now, because a digit has carried over, this implies that the digit A+B is a two digit number----> Now, the only way A+B or (1+B) will be a two digit number is if B = 9.
therefore statement B is sufficient as well.
You cannot use information given in the first statement (AB + BA = AAC) for the second.
Re: If A, B and C are digits and AB#0, what is the value of B? [#permalink]
10 Dec 2012, 03:42
Ans: The only possibility of getting AA after adding A and B is if A=1 (adding two digits cannot give a number greater than 20). Since the addition of two numbers gives a three-digit number, therefore A+B>equal to 10 , that leaves B to be only 9. Therefore the answer is (D). _________________
Re: If A, B and C are digits and AB#0, what is the value of B? [#permalink]
10 Dec 2012, 03:45
Expert's post
priyamne wrote:
Ans: The only possibility of getting AA after adding A and B is if A=1 (adding two digits cannot give a number greater than 20). Since the addition of two numbers gives a three-digit number, therefore A+B>equal to 10 , that leaves B to be only 9. Therefore the answer is (D).
Re: If A, B and C are digits and AB#0, what is the value of B? [#permalink]
12 May 2014, 17:51
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Re: If A, B and C are digits and AB#0, what is the value of B? [#permalink]
05 Nov 2015, 01:08
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