Number Systems and Codes Questions and Answers
Number Systems and Codes Questions with Answers form the foundation of digital electronics reasoning and aptitude exams. This topic includes binary, octal, decimal, and hexadecimal number conversions, along with coding systems like Gray, ASCII, and BCD. Competitive exams such as GATE, DRDO, and ISRO often test candidates’ logical understanding of number representation and digital computation. Practicing reasoning questions and answers with step-by-step solutions builds numerical reasoning and circuit analysis confidence. Each question is structured to test clarity on base conversions, weighted codes, and arithmetic operations. With these aptitude-based questions, you can easily master the numerical logic behind digital systems. Download the PDF and start your reasoning test practice online today.
Number Systems and Codes
71. Convert the following BCD number to decimal. 010101101001bcd
- 539
- 2551
- 569
- 1552
72. The binary number 11001110 is equal to the decimal number ________.
- 12
- 206
- 127
- 66
73. The binary number for F3A16 is ________.
- 111100111010
- 111100111110
- 000000111010
- 000011000100
74. Convert the following BCD number to decimal. 100000000011bcd
- 8003
- 803
- 1003
- 103
75. Convert the following hexadecimal number to binary. 14B16
- 1011010000012
- 0001010010112
- 0001010011012
- 1101010000012
76. What is the result when a decimal 5238 is converted to base 16?
- 327.375
- 12.166
- 1388
- 1476
77. The octal number for binary 1101110101110110 is ________.
- 6545218
- 5565618
- 1566568
- 1565668