Discussion

Explanation:

Given number is in base 2.

∴ (11111111111)₂ 

= 1 × 2¹⁰ + 1 × 2⁹ + 1 × 2⁸ + 1 × 2⁷ + 1 × 2⁶ + 1 × 2⁵ + 1 × 2⁴ + 1 × 2³ + 1 × 2² + 1 × 2¹ + 1 × 2⁰.

= 2¹⁰ + 2⁹ + 2⁸ + 2⁷ + 2⁶ + 2⁵ + 2⁴ + 2³ + 2² + 2¹ + 2⁰

= 2¹¹ – 1 = 2047

Hence, 2047.

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