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Question

The value of 101×102 is

A
10230
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B
10320
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C
10203
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D
10302
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Solution

The correct option is A 10230
101×102
=(100+1)(100+2)
=(100)2+100(1+2)+1×2[using(x+a)(x+b)=x2+x(a+b)+ab]
=10000+300+2
=10302

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