Latest CTS Aptitude Question SOLUTION: What is the value of (10101)2 in decimal number system? (

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

Asked In CTS Ramya (5 years ago)

Solved Priya Mohan Read Solution (6)

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Read Solution (6) :

Priya Mohan  (5 years ago) Best Solution

16 8 4 2 1
1 0 1 0 1 = 21

so the value is 21

Is this solution Helpfull? Yes (3) | No   

Pachaiyammal  (5 years ago)

1*2^0+0*2^1+1*2^2+0*2^3+1*2^4
=21

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kalyan  (5 years ago)

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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LOKESH  (4 years ago)

2^0*1+2^1*0+2^2*1+2^3*0+2^4*1=21

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Shekhar Valmikrao More  (3 years ago)

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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ANGEL M  (3 years ago)

16(1)+8(0)+4(1)+2(0)+1(1)=21

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