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In the addition problem above, each of the symbols *, # and represen

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In the addition problem above, each of the symbols *, # and represen [#permalink]

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New post 14 Jun 2015, 13:11
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* + # = @

In the addition problem above, each of the symbols *, # and @ represents a positive single-digit number. If * > #, and if * and # are both odd, what is the value of *?

(1) @=6
(2) #=1
[Reveal] Spoiler: OA
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Re: In the addition problem above, each of the symbols *, # and represen [#permalink]

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New post 14 Jun 2015, 20:40
I find it confusing to look at weird symbols like that, so I'd immediately replace everything with letters:

A, B and C are positive single digit integers, and all of these things are true:

• A > B
• A and B are both odd
• A + B = C.

We can leave this list as is, but I'm in the habit of quickly extracting any easy information from facts like these, because often that's the key to a GMAT DS problem. So one thing I'd notice is that, if A and B are odd, then using the equation A+B=C, it must be true that C is even. And since C is the sum of A and B, which are both positive, C is larger than A, and larger than B. So we can improve our list of facts:

• C > A > B
• A is odd, B is odd, and C is even
• A + B = C

We need to know what A is.

Statement 1 tells us C = 6, and since C is the sum of two odd single-digit numbers which are different (since A > B), we must be adding 1 + 5, and B = 1 and A = 5.

Statement 2 tells us that B = 1. We can meet the restrictions above by letting A be any odd single digit integer between 3 and 7 inclusive (we can't have A=9 because A+B = C, and C must be less than 10), so S2 is not sufficient.
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Re: In the addition problem above, each of the symbols *, # and represen [#permalink]

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New post 14 Jun 2015, 23:19
heylookitskarl wrote:
* + # = @

In the addition problem above, each of the symbols *, # and @ represents a positive single-digit number. If * > #, and if * and # are both odd, what is the value of *?

(1) @=6
(2) #=1


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Re: In the addition problem above, each of the symbols *, # and represen [#permalink]

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New post 22 Feb 2017, 15:19
Has anybody really seen a question of this nature on the GMAT? I took the actual GMAT and didn't see any question like this. It was mostly exponents, functions and ratios.
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Re: In the addition problem above, each of the symbols *, # and represen [#permalink]

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New post 22 Feb 2017, 23:33
Nunuboy1994 wrote:
Has anybody really seen a question of this nature on the GMAT? I took the actual GMAT and didn't see any question like this. It was mostly exponents, functions and ratios.


Dear Nunuboy1994,

This is a GMAT forum. Moderators here monitor that all the questions posted are indeed of a GMAT-type and quality and 99.99% of the questions are. In fact ONLY Questions from Reliable GMAT Sources are Allowed on the Forum and non-GMAT questions, when spotted are removed.
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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: In the addition problem above, each of the symbols *, # and represen [#permalink]

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New post 08 Mar 2017, 19:47
straight A
the no. must be 5(*)+1(#)=6(@)
Re: In the addition problem above, each of the symbols *, # and represen   [#permalink] 08 Mar 2017, 19:47
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In the addition problem above, each of the symbols *, # and represen

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