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]
no, it's (a).
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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