The number 83 is written in the binary system as 

  1. 100110
  2. 101101
  3. 1010011
  4. 110110

Answer (Detailed Solution Below)

Option 3 : 1010011
Free
NDA 01/2025: English Subject Test
30 Qs. 120 Marks 30 Mins

Detailed Solution

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Concept:

Steps to convert decimal to binary:

  • Take the decimal number as a dividend.
  • Divide the number by 2.
  • Get the integer quotient for the next iteration.
  • Get the remainder (it will be either 0 or 1 because of divisor 2).
  • Repeat the steps until the quotient is equal to 0
  • Write the remainders in reverse order (which will be the equivalent binary number of the given decimal number).

 

Calculation:

Division

Remainder (R)

83 / 2 = 41

1

41 / 2 = 20

1

20 / 2 = 10

0

10 / 2 = 5

0

5 / 2 = 2

1

2 / 2 = 1

0

1 / 2 = 0

1

 

Now, write the remainder from bottom to up (in reverse order), this will be 1010011 which is the equivalent binary number of decimal integer 83.

Hence, option (3) is correct.

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