S is given only the sum of the two numbers, and P is given only the product. S and P are two mathematicians with perfect logic. The two numbers can include 2 or 9 and they can both be the same number. There are two unknown numbers between 2 and 9. Now let’s get into something a little harder. If you’re interested in more Lewis Carroll math puzzles, you can find them here. The question for you, or for an older child, is - why does this work? If the child has done this right, you might find a smile start to light up their face. Finally - and at this point you can add feigned concentration and appropriate magical phrases - ask them to multiply the second answer by 13. Then ask them to multiply the answer by 11.
Then tell them that you will reveal the number by producing two copies of it side by side! First ask the child to multiply their number by 7. Ask your own little Alice (or Bob) to think of a three-digit number without telling you what it is. This magic trick is designed for a child who can do multiplication reliably (get an assistant to help them if not). Carroll was an Oxford mathematician and avid puzzler, whose math puzzles have entertained many mathematicians, including the famous Terence Tao. It was used for this purpose by Lewis Carroll, the author of Alice’s Adventures in Wonderland. Here’s a simple example that might astonish a child in your life and even inspire a fascination with math. Finally, our friend astonishes us by telling us our secret number.
#MAGIC NUMBER MATHEMATICS SERIES#
We are then asked to do a series of simple arithmetical operations on it.
We are asked by a friend to think of a certain number without revealing it. Many of us have experienced this as children. Just like stage magic, these examples can leave you wondering, “How did they know that?” In today’s Insights puzzle we’ll explore four examples of mathematical magic that can seem, at first glance, like mind reading. Clarke famously wrote, “Any sufficiently advanced technology is indistinguishable from magic.” Indeed, the science fiction author Arthur C. To those unfamiliar with the math behind the prediction, this outcome might seem like magic. If you use it to accurately describe a situation, sometimes you can predict the inevitable - for instance, the moment an eclipse will take place - centuries in advance.
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