Tech puzzles, also known as tech challenges or brain teasers, are problems or questions related to technology, computer science, and the digital world that require creative thinking and problem-solving skills to solve. These puzzles are often used in interviews, educational settings, or as a fun way to test and improve one’s technical knowledge and logical reasoning. Here are a few examples of tech puzzles:

**The Two Doors Problem**: You are in a room with two doors. One door leads to certain death, and the other door leads to freedom. There are two guards, one in front of each door. One guard always tells the truth, and the other always lies. You don’t know which guard is which, and you can only ask one yes-or-no question to one of the guards. What question should you ask to determine which door leads to freedom?**The Tower of Hanoi**: The Tower of Hanoi is a classic mathematical puzzle. You have three rods and a number of disks of different sizes, which can slide onto any rod. The puzzle starts with the disks in a neat stack in ascending order of size on one rod, with the smallest disk at the top. The goal is to move the entire stack to another rod, obeying the following rules:- Only one disk can be moved at a time.
- Each move consists of taking the upper disk from one of the stacks and placing it on top of another stack or an empty rod.
- No disk may be placed on top of a smaller disk.

**The Chessboard and Rice Grains**: In this puzzle, a chessboard is placed in front of you, and you are given one grain of rice to put on the first square (top left). Then, you are given double the number of grains for each subsequent square (i.e., 2 grains on the second square, 4 on the third, 8 on the fourth, and so on). How many grains of rice will you have placed on the entire chessboard when you reach the 64th square?**The Egg Drop Puzzle**: You are given a certain number of identical eggs and access to a 100-story building. The goal is to find the highest floor from which an egg can be dropped without breaking. You have to determine this while using the fewest number of egg drops possible. What strategy should you use?**The Bridge and Torch Problem**: Four people need to cross a bridge at night. They have only one torch, and the bridge can only hold two people at a time. The four people walk at different speeds: one can cross the bridge in 1 minute, another in 2 minutes, another in 5 minutes, and the slowest in 10 minutes. When two people cross the bridge together, they must go at the slower person’s pace. What is the fastest time in which all four people can cross the bridge?

These tech puzzles are designed to test various skills, including logical reasoning, algorithmic thinking, and problem-solving abilities. They are not only fun but also help individuals develop critical thinking skills and explore creative solutions to complex problems in the tech world.