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On natural numbers, (aRb) holds when (a) and (b) have the same last digit. Which is the equivalence class of (42)?

Answer and explanation

Correct answer: All natural numbers ending in (2)

Step 1: The last digit of (42) is (2). Step 2: Numbers such as (2,12,22,32,42) have the same last digit. Step 3: This class is decided by the last digit, not just by parity.

Related tags

Last DigitNatural NumbersEquivalence ClassEquivalence RelationRelations And FunctionsMathematicsClass 12 Mcq

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