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Convert the following Binary number into a Decimal number.
(010101)₂

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(11)₁₀

(21)₁₀

(31)₁₀

(41)₁₀

answer is B.

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Detailed Solution

(010101)₂= (0X2⁵+ 1X2⁴ + 0X2³+ 1X2² + 0X2¹ + 1X2⁰ )

= (0 + 16 + 0 + 4 + 1)

=16 + 4 + 1

= (21)₁₀

$∴$ (010101)₂ = (21)₁₀

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