These are the interesting puzzles and brain teasers on Logic Gates. If you can solve them, then your understanding of logical approach in logic gates circuits will be more creative.
You will surely enjoy solving them…!
Learn with fun…!
Note: The answers are given at the bottom of this page. But don’t just go to the answers. First try to solve them.
Table of Contents
Introduction
In every puzzle you will find different combinations of logic circuits. Every circuit has only one output connected with an LED. What you have to do is to write a perfect combination of binary input signals in every circuit, so that the output of the circuit will become HIGH i.e. binary-1 and the LED will glow…! Isn’t it simple…? Well, try it for yourself…!
Puzzle #1
Write the correct binary input signals i.e. either binary-1 or binary-0 at the input terminals A, B, C & D, so that the output and the LED will glow.
Puzzle #2
Write the correct binary input signals i.e. either binary-1 or binary-0 at the input terminals A, B, C & D, so that the output and the LED will glow.
Puzzle #3
Write the correct simplest input combination, at the input terminals A, B, C & D, so that the output and the LED will glow.
Puzzle #4
Write the correct simplest input combination, at the input terminals A, B, C & D, so that the output=1 and the LED will glow.
Puzzle #5
Write the correct simplest input combination, at the input terminals A, B, C & D, so that the output=1 and the LED will glow.
Puzzle #6
Write the correct simplest input combination, at the input terminals A, B, C & D, so that the output and the LED will glow.
Puzzle #7
Write the correct simplest input combination, at the input terminals A, B, C, D, E & F, so that the output and the LED will glow.
Puzzle #8
Write the correct simplest input combination, at the input terminals A, B, C, D, E & F, so that the output and the LED will glow.
Puzzle #9
Write the correct simplest input combination, at the input terminals A, B, C, D, E & F, so that the output and the LED will glow.
Puzzle #10
Write the correct simplest input combination, at the input terminals A, B, C, D, E, F, G & H so that the output and the LED will glow.
Answers
- Puzzle #1: A & B & C & D = 1
- Puzzle #2: (A & B = 1) & (C OR D = 1)
- Puzzle #3: (A & B = 1) OR (C & D = 1)
- Puzzle #4: (A & B = 0) OR (C OR D = 0)
- Puzzle #5: (A=0 OR B=0) & (C=0 & D=0)
- Puzzle #6: A & B & C & D = 1
- Puzzle #7: ?
- Puzzle #8: ?
- Puzzle #9: ?
- Puzzle #10: ?
Please note that some of the answers given above are obtained by reducing the final Boolean equation of the output of the circuit.
If you have any query please comment below.