(Logic) Puzzles/Brainteasers/etc.

SaberSlash49

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This is a place to post any interesting logic puzzles, brainteasers, mysteries, or any good puzzles you may have picked up, and share them. It might be useful to list its difficulty.

THIS DOES NOT INCLUDE TWISTING PUZZLES, SUDOKU (or its relatives), CROSSWORDS, OR WORD SEARCHES.

Include your answer in a
spoiler
box or put it in WHITE (white), or you can let people guess and post in a later post.

Here's a crime puzzle. Difficulty: Easy-Medium



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The ship's risk manager was nearly drowning in anxiety. When she'd finished playing the small snips of film retrieved from the ship's video surveillance cameras, she whined, "We have no idea what happened to Mr. Larson. His wife is frantic. You need to help me, Captain Bly!"

"Now is not the time to panic, Gloria."

Captain Bly famously kept his cool under pressure. This wasn't the first time a passenger had disappeared from his ship and it wouldn't be the last.
Cruise Ship was a cauldron of drunken revelers every night of the week.
Some of them got left in port.

Gloria wrung her hands and paced the cabin.

"Mr. and Mrs. Larson are with us throughout the Mediterranean on their honeymoon. Last night, they drank two bottles of wine at dinner, and had several cocktails in the Under Sea Lounge. Witnesses say they stumbled back to their cabin with a bottle off vodka at about 3 a.m."

She took a deep a breath and stated the rest in a rush, as if she wouldn't be able to finish otherwise. "Mrs. Larson passed out. When she woke up this morning, her husband had disappeared."

Gloria showed the captain two photos: One showed a bloody handprint on the four-foot railing outside his fourteenth deck cabin, and another showed a blood spotted awning on the balcony below. Captain Bly studied them carefully.
"It's a long way down and we're ten miles at sea from Kasudashi now," Gloria said. "No one could swim that far, especially if they were injured."

When she'd gone, the captain review her story and the collection of pictures she'd left. Three showed the couple in the Under Sea Lounge emptying their glasses of wine. Unfortunately, the ship did not have surveillance cameras in the cabin's hallways to identify those who entered the state-rooms. In international waters, Captain Bly was responsible for justice. He called on Chief Capote, head of ship security.

"We cleaned up over four liters of blood in that cabin that matches Mr. Larson's blood type. We're running the DNA now. " Chief Capote said. The captain showed Chief Capote one of the cabin photos Gloria had left:

"What did they have in this cooler?" he asked.
"Mrs. Larson said it was her insulin---she's diabetic."
"Did you check inside to verify that?" asked the captain.
"No."

Captain Bly thought for a few moments. "How much life insurance was there and who gets it?"

"Five million dollars, I'm told. The beneficiary is Mrs.Larson."

Captain Bly smiled. "Bring Mrs. Larson to my cabin. And check the cooler for traces of Mr. Larson's blood."

Who killed Mr. Larson?


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I'll let you guys guess a bit on that, but don't forget to put it in white or spoiler tags.
spoiler tags are

[\SPOILER]

but instead of \, use this slash ----> /
 
Easy (Not sure if this qualifies)
____________________________

What seven letter word becomes longer when a letter is removed?
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Easy - Medium
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A sharpshooter hung up his hat and put on a blindfold. He then walked 100 yards, turned around, and shot a bullet through his hat. The blindfold was a perfectly good one, completely blocking the man's vision. How did he manage this?

____________________________
 
Easy (Not sure if this qualifies)
____________________________

What seven letter word becomes longer when a letter is removed?
____________________________

Easy - Medium
____________________________

A sharpshooter hung up his hat and put on a blindfold. He then walked 100 yards, turned around, and shot a bullet through his hat. The blindfold was a perfectly good one, completely blocking the man's vision. How did he manage this?

____________________________

Easy-lounger Medium- He hung his hat up on the barrel of the gun?
 
Ok, I guess I'll put this one as "Slightly Difficult".

Prove or give a counter-example of the following statement:
In three space dimensions and time, given an initial velocity field, there exists a vector velocity and a scalar pressure field, which are both smooth and globally defined, that solve the Navier–Stokes equations.
 
Easy-Medium...ish

Over the side of a boat floating in a harbor there hangs a rope ladder containing ten rungs. Each rung is one foot from the next one and the bottom rung is resting on the surface of the water. The tide rises at a rate of one foot an hour. How long will it take the water to reach the top rung?
 
Easy-Medium...ish

Over the side of a boat floating in a harbor there hangs a rope ladder containing ten rungs. Each rung is one foot from the next one and the bottom rung is resting on the surface of the water. The tide rises at a rate of one foot an hour. How long will it take the water to reach the top rung?

Never because the rungs rise with the water
 
Easy-Medium...ish

Over the side of a boat floating in a harbor there hangs a rope ladder containing ten rungs. Each rung is one foot from the next one and the bottom rung is resting on the surface of the water. The tide rises at a rate of one foot an hour. How long will it take the water to reach the top rung?

The water will never reach the top rung because the ladder rises with the boat, which rises with the water.
 
Math? Medium

Two cars (A and B) are exactly 50 miles apart and heading straight toward each other. Car A is traveling at a speed of exactly 30 miles per hour. Car B is traveling at a speed of exactly 20 miles per hour. They collide.

There is a super fly that consistently travels at a speed of 100 miles per hour. Prior to collision (and when they are 50 miles apart), the fly darts from car A and when it reaches car B, it immediately stops and changes directions heading back to car A. It continues to dart between the two cars until it eventually gets smashed in their collision. How far did the fly travel before the cars collided? Explain
 
Medium

A man wakes up in bed, because he hears a disaster outside. He looks out the window, runs up the stairs, turns the light on, runs back downstairs and kills himself. What happened?
 
Last edited:
Math? Medium

Two cars (A and B) are exactly 50 miles apart and heading straight toward each other. Car A is traveling at a speed of exactly 30 miles per hour. Car B is traveling at a speed of exactly 20 miles per hour. They collide.

There is a super fly that consistently travels at a speed of 100 miles per hour. Prior to collision (and when they are 50 miles apart), the fly darts from car A and when it reaches car B, it immediately stops and changes directions heading back to car A. It continues to dart between the two cars until it eventually gets smashed in their collision. How far did the fly travel before the cars collided? Explain
It takes the cars one hour to collide. If the fly goes 100mph and turns around instantly then in one hour it flies 100 miles.
 
Easy-ish.

A man walks into a pet shop looking to buy a parrot. The shop owner takes him over to the "Great Peruvian Purple Parrot of Paridise" and explains 'This parrot will repeat every word it hears'.

The man buys the parrot and takes it home. One week later he takes it back and goes. "This parrot hasn't said a damn word! All it does is squawk at me!"

What was wrong?
 
Easy-ish.

A man walks into a pet shop looking to buy a parrot. The shop owner takes him over to the "Great Peruvian Purple Parrot of Paridise" and explains 'This parrot will repeat every word it hears'.

The man buys the parrot and takes it home. One week later he takes it back and goes. "This parrot hasn't said a damn word! All it does is squawk at me!"

What was wrong?

it's deaf xD
 
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