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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 number 13 in hexadecimal number system is denoted by the symbol ______.
(a) D (b) C (c) E (d) F
3. The sum of binary numbers 11 and 10 is ______.
(a) 1101 (b) 111 (c) 101 (d) 1001

4. 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. A digital computer represents data and information using the _________ number system.

3. The hexadecimal number system consists of _________ symbols.
4. 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. _______
4. The octal number system uses digits 0 to 9 and letters A to F. _______

D. Answer the following questions.

1. What is a number system? Name the different types of number system.
2. What is the difference between the face value and place value of a digit in a number?
3. Write a short note on binary number system.
4. Write the rules for multiplication of two binary numbers.

Computational Skills
Mind Stretching

1. Convert the given decimal numbers into binary numbers.

a 78 b 186

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