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4×7=394\times7 = 39 ആയാൽ 8×78\times 7 ന് തുല്യമായ സംഖ്യയേത് ?

A81

B71

C75

D79

Answer:

B. 71

Read Explanation:

4×7=39 4×7+(4+7) =39 8×7 = 8×7+(8+7) =71

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