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Post-Processing  
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 A number system defines a set of values used to represent different quantities.
 The number of digits in a number system is called its Base or Radix.

 The face value of a digit in a number is the digit itself. The place value of a digit in a number
depends on its place in the number and the base of the number system.
 The common number systems used are – Decimal, Binary, Octal, and Hexadecimal.
 Numbers can be converted from one number system to another.

 Just like decimal numbers, binary numbers can be added, subtracted, multiplied, or divided.

INFO RETENTION
INFO RETENTION

A. Select the correct option for each of the following statements.
1. The base in the octal number system is ______.

(a) 10 (b) 8 (c) 16 (d) 2
2. The place value of the digit 8 in the decimal number 48567 is ______.

(a) 8 (b) 80000 (c) 8000 (d) 800
3. The number 13 in hexadecimal number system is denoted by the symbol ______.
(a) D (b) C (c) E (d) F

4. The sum of binary numbers 11 and 10 is ______.
(a) 1101 (b) 111 (c) 101 (d) 1001

5. In binary addition, 1 + 1 is equal to ______.
(a) 1 (b) 0 (c) 2 (d) 10

B. Fill in the blanks with the correct answer.

1. A _________ defines a set of values used to represent quantities.
2. The hexadecimal number system is also known as _________ number system.

3. A digital computer represents data and information using the _________ number system.
4. The hexadecimal number system consists of _________ symbols.

5. The _________ value of a digit in a number is the digit itself.

C. Write ‘T’ for True and ‘F’ for False statement.

1. The decimal number system consists of 10 digits – 0 to 9. _______
2. The face value of a digit depends on its place or position in the number. _______

3. The base of binary number system is 2. _______

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