What is the base 10 equivalent of the unsigned integer stor

What is the base - 10 equivalent of the unsigned integer stored in binary as shown below? 1010101

Solution

(1010101)₂ = 1x2⁶ + 0x2⁵ + 1x2⁴ + 0x2³ + 1x2² + 0x2¹ + 1x2⁰

  = 64 + 0 + 16 + 0 + 4 + 0 + 1 = 85 =(85)₁₀