Number Systems and Codes

What is the base of the binary number system?

• 10

• 8

• 2

• 16

Convert the decimal number 25 to binary.

• 11111

• 11001

• 10101

• 10010

What is the hexadecimal equivalent of the decimal number 128?

• 80

• B. 96

• A. 64

• C. 112

Convert the octal number 56 to decimal.

• 53

• 57

• 54

• 58

What is the ASCII code for the letter 'A'?

• 66

• 67

• 68

• 65