如何只用3刀將蛋糕分成8等份？

解決腦筋急轉彎是保持思維新鮮的最佳方法之一，並可能幫助您從新的角度看待問題。

Brainteaser fans were left scratching their heads after a魔鬼般小的难题 left social media users baffled.

Brainteaser fans were left scratching their heads after a魔鬼般小的難題left social media users baffled.

But fear not, because we've got the answer - and it's a piece of cake.

但不用擔心，因為我們已經找到了答案 - 而且這只是小菜一碟。

The conundrum was posted on Instagram's Threads by user @ellis_puzzles, who asked a seemingly simple question: how do you divide a cake into eight equal piece?

用戶@ellis_puzzles 在 Instagram 的 Threads 上發布了這個難題，他提出了一個看似簡單的問題：如何將蛋糕分成八等份？

Surely, it sounds like a piece of cake at first - but there's a twist in that you're only allowed to do it in three slices.

當然，一開始這聽起來像是小菜一碟，但有一個不同之處，那就是你只能分成三片。

The full post reads: "Only puzzle champion with math and geometry knowledge can answer this question.

完整的帖子寫道：「只有具有數學和幾何知識的拼圖冠軍才能回答這個問題。

"There are 7 people at your birthday party. How can you divide a round cake for 8 people (including you) making only 3 cuts?"

“你的生日派對有7個人，一個圓蛋糕你怎麼能只切3刀就給8個人（包括你）分呢？”

This devilish little dilemma caused a stir among social media users with various solutions flying around across 80 comments.

這個可怕的小困境在社群媒體用戶中引起了轟動，80 則評論中流傳著各種解決方案。

One user, nunocastelobranco, said: "3 vertical cuts, one radial cut, and then two diameter cuts in 2 opposite directions."

一位名叫 nunocastelobranco 的用戶說：“3 次垂直切割，1 次徑向切割，然後是 2 個相反方向的兩個直徑切割。”

Not to be outdone, illio_ja offered an alternative with: "1. Split in half, so you have 2 thinner cake, stack it together and cut it 2 times with + or × shape".

illio_ja 也不甘示弱，提出了另一種選擇：「1.分成兩半，這樣你就有了 2 個更薄的蛋糕，將它們疊在一起，然後用 + 或 × 形狀切割兩次」。

Elsewhere, servagi1990 chimed in with another solution: "1 cut from the side through the middle, then 2 cuts from the top. 1 vertical through the middle and 1 horizontal through the middle".

在其他地方，servagi1990 提出了另一種解決方案：「1 從側面穿過中間切割，然後從頂部切割 2 次。1 次垂直穿過中間，1 次水平穿過中間」。

While user winstonsmith2112 said: "Slice the cake horizontally, making two layers, then make the following two cuts vertically. Four people get cuts from the top of the cake, and four people get cuts from the bottom of the cake

而使用者winstonsmith2112則表示：「將蛋糕水平切兩層，然後垂直切兩刀。四個人從蛋糕頂部切，四個人從蛋糕底部切

"Too easy."

“太容易了。”

Did you manage to solve it? Regardless of whether you cracked it or not, tackling regular brainteasers like this is a fantastic way to flex your creative thinking muscles.

你設法解決了嗎？不管你是否成功，解決像這樣的常規腦筋急轉彎都是鍛鍊你的創造性思考能力的絕佳方法。

Aaron Seitz, PhD., professor of psychology and director of the Brain Game Centre at the University of California in Riverside told Real Simple: "Studies show that staying mentally fit is important for long-term cognitive health, but the difficulty is figuring out exactly how to do it.”

加州大學河濱分校心理學教授兼腦遊戲中心主任 Aaron Seitz 博士告訴《Real Simple》：“研究表明，保持心理健康對於長期認知健康很重要，但困難在於準確地弄清楚該怎麼做。”

He also added that some games work differently for different people and finding your own challenge is probably the best thing to do and, "if you think about diet and exercise routines, some things work better for some people than others, and the same is true with brain games."

他還補充說，有些遊戲對不同的人來說效果不同，找到自己的挑戰可能是最好的事情，「如果你考慮飲食和運動習慣，有些事情對某些人來說比其他人更有效，同樣的道理透過腦力遊戲。