00:00So, John is hosting his monthly thematic dinner.
00:04Each month, he picks a different theme, and they spend the entire evening eating and laughing.
00:09He spent days searching the Internet for one of the most difficult riddles he could find
00:14to give his friends a real challenge to solve.
00:17That's when he found the 4 glasses puzzle.
00:19His guests arrived, and he explained the rules of the game to them.
00:23They would each start the game with 4 empty glasses that were right-side up.
00:27In each move, they would need to invert exactly 3 different glasses.
00:32To win the game, the person should be able to find the minimum number of moves to get
00:36all of the 4 glasses facing down.
00:39Hey, do you think you can beat John's guests in solving this riddle?
00:57In the first move, you should pick any 3 glasses you'd like and turn them upside
01:01down.
01:02Then, the second move is where you should use a little bit more of your wits and skills.
01:07You shouldn't pick the exact same 3 glasses you picked in the first round, otherwise that
01:12would take you back to the beginning.
01:14Instead, you could choose to invert the glasses 1, 2, and 4, for example.
01:20So after move 2, you end up with the following order – up, up, down, down.
01:25Then your best move may sound counterintuitive, but you should pick 2 glasses that are down
01:31and 1 glass that is up.
01:33In the fourth move, you should pick the 3 glasses that are up and invert them.
01:38This way, you'll have all 4 glasses facing down.
01:42Congrats!
01:43You've just shown John and his party guests that the minimum number of moves to win this
01:47game is 4.
01:50Sandy was exploring the wood near her house when she discovered a magical portal.
01:55On the other side of it, she was shocked to find 3 of her close friends – Alex, Betty,
02:01and June.
02:02They had been captured by a trickster creature that had cast a spell on them.
02:07After that, one of them could only tell lies, the other could only tell the truth, and the
02:12third one was sort of a spy.
02:14Sometimes she lied, other times she told the truth.
02:18Sandy decided to talk to each one of them.
02:21Alex said she was not the truth-teller, Betty said she was not the spy, and June said she
02:27was not a liar.
02:29Can you help Sandy figure out what June was cursed with?
02:45Well, let's see how we can solve the problem.
02:48In total, there are 6 possibilities to consider, and we should start with the most obvious.
02:54If Alex was a truth-teller, then she could not say that she is not a truth-teller.
03:00She can't be the liar either, because then her statement would actually be true.
03:04So it's settled – Alex is the spy.
03:08If Betty was a liar, then she would be always lying.
03:12Saying that she is not a spy would actually be true, so this is a no-go.
03:16Since she can't be a spy, this means she's the truth-teller.
03:20Bingo!
03:21This means that June is the liar.
03:25It was Blake's lucky day.
03:27He won $1,000 on a lottery ticket.
03:30Of all the things he could spend this on, he knew immediately that he wanted to spend
03:34this money buying his favorite chocolate in the world.
03:38The chocolate bar he loves costs $1, and since his luck just keeps growing, the local store
03:44is having a promotion.
03:45For every 4 chocolate wrappers he takes back to the store, the store will give him 1 chocolate
03:51bar for free.
03:53Talk about abundance!
03:55How about you show off your genius and figure out the maximum number of chocolate bars Blake
04:00can get?
04:14Now let's see the best he could do.
04:16If Blake spends all of his money and buys 1,000 chocolate bars, he'll have 1,000 wrappers,
04:22correct?
04:23Then, if he exchanges every 4 wrappers for 1 additional chocolate bar, he can get 250
04:30more chocolate bars from his 1,000 wrappers.
04:33Now if Blake exchanged those 250 wrappers, he'd get another 62 chocolate bars.
04:39He'd use 248 wrappers, leaving him with the remaining 2 wrappers.
04:45Then his best deal would be to take those 62 wrappers, add the remaining 2 he kept from
04:50the last exchange, and he would have 64 wrappers in total.
04:54He can exchange these wrappers for another 16 chocolate bars.
04:58Then he'd take these 16 wrappers and trade them for 4 more chocolate bars.
05:03Exchanging those last 4 wrappers, he'd get his final chocolate bar.
05:07So if Blake follows this process, he'll get a maximum of 1,333 chocolate bars in total.
05:15Now we're not saying this is a smart idea, but…
05:18Your mother asked you to measure 4 cups of orange juice using 2 jugs.
05:23The thing is, you have a 20-cup jug and a 36-cup jug.
05:27How can you do it?
05:43You need to start by pouring the orange juice into the smaller jug.
05:47Then pour all the juice from that jug into the 36-cup jug.
05:51This way, the empty space from the big jug would give you 16 cups.
05:56After doing that, you can fill the 20-cup jug using more fresh juice and pour that liquid
06:02into the 36-cup jug.
06:04That way, you'll fill the entire 36-cup jug, and what's left in the smaller jug
06:10is the 4 cups of juice your mom asked for.
06:13Then you can start an orange juice stand!
06:16Sophie's aunt, Clara, bought a bottle of perfume for her niece's birthday.
06:22Unfortunately, Sophie couldn't keep it because her sister Mia is terribly allergic
06:27to perfumes.
06:29Sophie brought it back to her aunt, who had purchased it for $65.
06:34Aunt Clara then sold the perfume to someone else for $80.
06:38But then she remembered she had another niece, Lily, so she bought it back from the lady
06:43for $70.
06:44However, Lily turned out to be allergic too, so Aunt Clara had to sell the perfume again,
06:51this time for $60.
06:53Did you make any profit in this whole situation?
06:58Yes, Aunt Clara made a $5 profit and celebrated it by grabbing a large latte.
07:14James, a mad scientist, was on a quest to solve a crazy problem from a friend.
07:20His challenge had him stopping everything just to figure it out.
07:24James had 2 stacks of cups to analyze.
07:27One stack had 5 cups piled on top of each other, reaching a total height of 13.5 inches.
07:34Right next to this stack, there was another stack with just 2 cups, totaling 7.5 inches
07:40in height.
07:56James needed to figure out how tall a single cup was.
08:00At first glance, it might seem like you could just divide the total height by the number
08:04of cups, but that wouldn't work here.
08:07Instead, James thought about the problem differently.
08:10He considered the height of a single cup as xx, and noticed that each cup didn't sit
08:16perfectly on top of each other.
08:18There was a bit of overlap.
08:19For the 2-cup stack, the combined height is 7.5 inches.
08:24This includes the full height of the first cup plus the part of the second cup that sticks
08:29out just above the first cup.
08:31The 5-cup stack, which is 13.5 inches tall, includes the height of the 2-cup stack plus
08:38the additional height contributed by the overlapping parts of the 3 more cups on top.
08:44By examining the difference, James realized that the height of the overlapping parts of
08:48the cups amounted to 2 inches.
08:51With this information, he figured out that the remaining height for a single cup was
08:565.5 inches.
08:58Eureka!
08:59His persistence paid off, and James cracked the riddle.
09:03You might say, his cup runneth over, but that's too obvious a pun.
09:08But I'll say it anyways.
09:09That's it for today!
09:12So hey, if you pacified your curiosity, then give the video a like and share it with your
09:16friends!
09:17Or if you want more, just click on these videos and stay on the Bright Side!
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