What is the value of (10101)2 in decimal number system? (

• 16 8 4 2 1
  1 0 1 0 1 = 21
  
  so the value is 21
• 5 years agoHelpfull: Yes(3) No(0)
• 1*2^0+0*2^1+1*2^2+0*2^3+1*2^4
  =21
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• take the digits from right side
  101-5
  010-2//adding one digit extra in left side ,in order to make both 3 digit equal
  so, the value is 25
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• 2^0*1+2^1*0+2^2*1+2^3*0+2^4*1=21
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• Step by step solution
  Step 1: Write down the binary number:
  
  10101
  
  Step 2: Multiply each digit of the binary number by the corresponding power of two:
  
  1x24 + 0x23 + 1x22 + 0x21 + 1x20
  
  Step 3: Solve the powers:
  
  1x16 + 0x8 + 1x4 + 0x2 + 1x1 = 16 + 0 + 4 + 0 + 1
  
  Step 4: Add up the numbers written above:
  
  16 + 0 + 4 + 0 + 1 = 21.
  
  So, 21 is the decimal equivalent of the binary number 10101.
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• 16(1)+8(0)+4(1)+2(0)+1(1)=21
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