The 4 4s problem… v100

Once again, credits to Enigmatic Code for providing the post. Puzzle 55: Ton up How can you divide 100 into four parts such that: adding 4 to the first part, subtracting 4 from the second part, multiplying the third part by 4 and dividing the fourth part by 4 results in all parts having the … Continue reading The 4 4s problem… v100 →

Dutch is very hard to pronounce

EEN VIER NEGEN Dutch is hard I guess

CAST THE ODD ONE OUT (is this among us)

When the egg is sus - SpokeIsHere, Lifesteal SMP The enigma where you find the imposter among the square numbers. CAST THE ODD ONE OUT!

The simple enigma

Well, not an enigma. Tantalizer 479. We're back with another "enigma" puzzle! I'll simplify it. Someone let the cat out. Who did it? Out of five suspects, their accusations are: Delia says it was one of the twins, Bert or ClaudAlice says it was BertBert (shame on you) says it was Claud, their twinClaud says … Continue reading The simple enigma →

A big number that shrinks down to about three

I remember this from a book. The puzzle is: The sum of the factors of 360 is 1170. What is the sum of the reciprocals of the factors of 360? At first glance, it might seem impossible to solve, but when you look at it deeper, it's easy. Let's do the classic: 1/1 + 1/2 … Continue reading A big number that shrinks down to about three →

There is a very hard, very hard…

Hey, it's the lousy author, back with another extraordinary enigma puzzle, and I do have to say, Uncle Bungle is really messed up.

Math is very biased

Imagine two people got married to each other and had two children. If one is a girl, what is the probability that the other child is also a girl? Instinctively, you should respond "1/2!" and you're right. Except... you're not. Think of all the possible ways that a girl could be in the family. There's … Continue reading Math is very biased →

2 and 3, what could be worse?

Take two numbers that add to 2 and multiply to 3. What is the sum of the reciprocals of these two numbers? The "truly mind-blowing" way to do this is like how I did it, going through the quadratic formula and such. Let a be one of the numbers, therefore the other number is 2-a. … Continue reading 2 and 3, what could be worse? →

The answer to Enigma #618

The answer to https://mathweneedtoknow.home.blog/2021/04/25/enigma-618-mysterious-divisor/ answer provided by me. Thank you to the many people at https://enigmaticcode.wordpress.com/.

The unreachable, the impossible, the multidimensional…

Level five of Conway's Soldiers, once thought impossible, but proved possible with certain manipulations. Credits to Simon Tatham and Gareth Taylor for the solution.