The OA is A.
1. The operator can be either + or x regardless of that we can get that (5*6)*2=5*(6*2)
for *= + we get, (5+6)+2=5+(6+2) = 13
for *=x we get, (5x6)x2=30x2 =60= LHS and RHS = 5x(12)=60
Hence A is sufficient.
2. B can be either + or - for which we will have different results.
- Deepak
Symb. DS
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Source: Beat The GMAT — Data Sufficiency |
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Vemuri
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Stmt1: From this statement, we know that * can either be + or X. Use these 2 functions in the equation provided in the question & will see that both the operations satisfy the equation. Hence sufficient.
Stmt2: From this statement, we know that * can either be + or -. Use these 2 functions in the equation provided in the question & will see that + satisfies the equation but - does not. Hence insufficient.
So, A is the answer
Stmt2: From this statement, we know that * can either be + or -. Use these 2 functions in the equation provided in the question & will see that + satisfies the equation but - does not. Hence insufficient.
So, A is the answer
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lunarpower
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no, it's (a).sanjib wrote:The symbol *represent one of the four Arithmetic operation:+-x /
(5*6)*2=5*(6*2)?
Stm1. 5*6=6*5
Stm2. 2*0=2
The OA is A
But I think it is C
Source : Official Sample test 2[/u][/i]
with statement (1), you DON'T know the unique identity of the operation: it could be either "+" or "x".
HOWEVER, you're making a dreadful mistake:
ALWAYS MAKE SURE THAT YOU'RE ANSWERING THE ACTUAL QUESTION.
i know this sounds obvious, but let's have a 2nd look here:
the question is NOT: "what is the operation?"
the question IS: "is (5 * 6) * 2 = 5 * (6 * 2)?"
the answer to that question is YES for "+", and YES for "x". therefore, statement (1) gives you an unequivocal "YES" and is thus sufficient.
the fact that you don't know the exact nature of the operation is irrelevant.
Ron has been teaching various standardized tests for 20 years.
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Pueden hacerle preguntas a Ron en castellano
Potete chiedere domande a Ron in italiano
On peut poser des questions à Ron en français
Voit esittää kysymyksiä Ron:lle myös suomeksi
--
Quand on se sent bien dans un vêtement, tout peut arriver. Un bon vêtement, c'est un passeport pour le bonheur.
Yves Saint-Laurent
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Learn more about ron
