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On (A={1,2,4,5}), (a*b) is the remainder when (ab) is divided by (6). Which statement is correct?

Answer and explanation

Correct answer: It is closed and (1) is identity

Step 1: Products of the given elements modulo (6) again lie in (1,2,4,5); for example, (2*4=2), (5*5=1). Step 2: (1*a=a) and (a*1=a), so (1) is the identity. Step 3: For a finite set, sample products reveal the closure pattern.

Related tags

Binary OperationsModulo MultiplicationClosureIdentityRelations And FunctionsMathematicsClass 12 Mcq

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