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If a number leaves remainder 1, 5, 7, or 11 when divided by 12, what is the remainder when its square is divided by 12?

Answer and explanation

Correct answer: 1

Step 1: Check the squares of the given remainders. Step 2: (1^2), (5^2), (7^2), and (11^2) all leave remainder 1 when divided by 12. Step 3: Checking the squares of possible remainders separately is a safe method.

Related tags

Euclids-Division-LemmaSquare-RemaindersNumber-FormsEuclid’s Division LemmaEuclid S Division LemmaReal NumbersMathematicsClass 10 Mcq

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