There is an ancient legend about a temple in Hanoi where a group of monks is working on a task that will end the universe. They have three diamond needles. On one needle, there is a stack of 64 golden discs, arranged by size—the largest at the bottom, getting smaller as they go up. Their job is to move that entire stack to another needle. But the laws of physics in this temple are strict.
One: You can only move one disc at a time.
Two: You can never, ever place a larger disc on top of a smaller disc.
If the monks finish the 64 discs, the world ends. Luckily for us, that takes billions of years. But today, I want you to visualize a smaller version. Just three discs: Large, Medium, and Small. They are stacked on the left rod. You need to move them to the right rod. The middle rod is your workspace. How many moves does it take, and can you visualize the sequence?
This is Tease Your Brain from English Plus Podcast. Never Stop Learning.
This puzzle, known as the Tower of Hanoi, is a fantastic test of your ability to visualize algorithms—step-by-step procedures. It’s recursive thinking.
Let’s try to do this in our heads. We have Rod A (Start), Rod B (Middle), and Rod C (Goal). The stack is on A.
Move 1: Take the Small disc from A and move it to C (the Goal).
Move 2: Take the Medium disc from A and move it to B (the Middle).
Now, here is the trick. You can’t put the Large disc on C yet because the Small one is there.
Move 3: Move the Small disc from C to sit on top of the Medium one on B.
Now Rod C is empty!
Move 4: Move the Large disc from A to C. The foundation is laid.
Now we just need to move the two discs from B to C.
Move 5: Move the Small disc from B back to A (Start).
Move 6: Move the Medium disc from B to C (on top of the Large one).
Move 7: Move the Small disc from A to C (on top of the Medium one).
Seven moves. That’s the minimum. It sounds easy with three, but every time you add a disc, the number of moves doubles plus one. For 64 discs, that number is so huge it’s literally longer than the age of the universe.
What I love about this puzzle is the rhythm of it. It’s a dance. You move the small one, move the big one, move the small one back. It teaches us about patterns. Once you see the pattern, the impossible task of 64 discs becomes just a matter of time, not difficulty.
So, here is a question for the road: The monks believe that finishing the task brings about the end of the old world and the birth of a new one. Do you think there is value in repetitive, meditative tasks like this, or do you find them frustrating? Does repetition clear your mind or clutter it? Share your thoughts with me in the comments.
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