169

This is a famous physical puzzle that can be tied to the fibonacci series. To answer the question as posed, the issue is that the two slopes are different ($\frac25$ vs $\frac38$). Note that all those numbers are in the fibonacci series ($1,1,2,3,5,8,13,21,\ldots$). Successive fractions are closer approximations to $\varphi$, alternating between above and ...


152

The diagram is misleading, as it hides a gap in the middle of the second configuration. This is what we actually get if we rearrange the shapes in question. Notice that the diagonal “bows” slightly, leaving some extra space between the shapes – this is where the extra unit of area creeps in. But you shouldn’t trust me any more than the person who drew ...


138

Explanation: 29 - 1 = 30 14 - 1 = 15 11 - 1 = 10 9 - 1 =10


133

With the bare minimal force required to not drop it, Rita If there were different universes, It is trivial to show that, in fact, nothing happens. So Rita proves Joe's conjecture is false. Joe might argue that Law 7, or Rita's grip itself, still explains this.


126

The guard is fired because:


125

It was


124



117

You think for a while and remember that Argentina had adopted the metric system way back in the late 19th century, while the metrication process in Britain had started just a handful of years before the Falklands War. The only things in the cell are a single metal chair bolted to the floor in the center of the room with a spotlight hanging from a cord ...


113

The answer is: Because:


111

I don't know how scientifically accurate this is, but it might be possible to use the light as a foucault pendulum to determine which hemisphere you are in. Of course, if there is a toilet (which is not mentioned), a flush would do the trick.


111

His wife The elevator So now he's I guess you could argue that the event is a sort of "communication", but that seems pretty weak to me.


109

Perhaps he really needed to In this case, what he bought was


108

I can do this by simply which is true :)


106

Because...


104

This is kind of a play on words, but: Along similar lines, this works too:


103

All the rooms in this hotel correspond to


101

The answer is a postbox/mailbox because if you remove a physical letter from it, it remains a mailbox; its meaning is still to hold letters. You can remove all the letters, but it will still be a mailbox.


100

Note that the mathematical inconvenience is caused by the fractions in the will not summing to one: $$\frac{1}{2} + \frac{1}{3} + \frac{1}{9} = \frac{17}{18}$$ Assuming that the father intended to divide the entire flock, we can The eldest son will get: The middle son will get: The youngest son will get:


99

If you look at the numbers upside down, they read 86, __, 88, 89, 90, 91. The number that fits this pattern is, of course, 87. Therefore, the space as the picture is currently viewed should be filled in with L8.


95

Pardon my French, but no whole number smaller than 100 can be larger than 99, so this puzzle must be completely and utterly


93

NOTHING. The pronunciation of this in various accents could be rendered as NOTHIN' (one letter removed), NOT'IN' (two letters removed), or NOT'N' (three letters removed). And of course if you remove all the letters you're left with nothing!


91

I know I'm coming in late here, however, I'll toss a completely different take on this.


87

Brilliant puzzle. Puzzle 1: Puzzle 2: Puzzle 3: Puzzle 4: Puzzle 5: Explanation: Individual solutions


86

Maybe.. LOL


85

First answer here, I hope I abide by the format. Are you For the hints: I Last billions of years or a couple of milliseconds. I embody the Jurassic period and the Renaissance. I am composed of 24 letters of the English alphabet, and 116 chemical elements. I am your entire life, and I am waiting on you. There was an image attached to this riddle, but ...


85

You are a: and the rooms are: 1st floor: I poked my head into room 130 and saw someone with a deck of cards. She was staring intently at it, then flipped the top card over with great conviction. She then sighed sadly and scribbled something down on a notepad. 3rd floor: There were a bunch of unsavory mobster-types hanging out by room 364, so I kept ...


84

A different possibility:


80

Wave your hand through the thick layer of dust until you start sneezing. Eventually someone will say "Bless you" or the equivalent in whichever language, and you're good to go.


80



78

Sounds like


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