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Question

Simplify the expression and choose the correct option

28×312×69


A

4×6162

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B

2×681

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C

4×681

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D

8×6162

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Solution

The correct option is A

4×6162


The given expression 28×312×69 can be written as

(8)12×(12)13×(9)16=((2)3)12×((2)2(3))13×((3)2)16=(2)32×(2)23(3)13×(3)13=(2)136×(3)23=(2)136×(3)46=(2)2(2)16×(3)46=4((2)(3)4)16=4((2)(81))16=4(162)16


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