A teasingly tricky maths challenge that claims to separate the real boffins from those who just claim to know the answers is sweeping Facebook.
一道號(hào)稱(chēng)能瞬間區(qū)分“真天才”和“自詡天才”的數(shù)學(xué)題席卷臉書(shū)。

Some three million people have already taken the tricky 'Intelligence Test' which carries a 'share if you understand' tag on it.
此題源于一則“智力測(cè)試”——標(biāo)簽為“看懂的人請(qǐng)分享”，約有300萬(wàn)人接受了測(cè)試。

Unsurprisingly, a shed-load of people have shared it, keen to show that they have an IQ of more than 150, apparently what you need to be able to understand it.
不出所料，很多人分享了它，迫切想要證明自己屬于智商達(dá)150以上的人——150被認(rèn)為是能看懂這則測(cè)試所需的最低智商。

However, one doubting brainbox has devised a 'test for a test' to see if those who are sharing the solution to the problem really do know their stuff.
不過(guò)，一位持懷疑態(tài)度的聰明人又設(shè)計(jì)了一道“測(cè)試中的測(cè)試”，想看看那些分享這則測(cè)試的人是不是真的看懂了。

YouTuber Presh Talwalker created something which needs the same logic from the test to be applied to another piece of maths to get a correct answer.
YouTube用戶“Presh Talwalker”用上述測(cè)試題的相同邏輯擬了另一道題，歡迎大家給出正確答案。

Talwalker says of the new test: 'If you understand the rule you should be able to solve this problem.'
“Talwalker”表示：“如果你知道測(cè)試的解題規(guī)則，那么你就能答出這道題。”

問(wèn)題：

Based on the intelligence test rule: x + y = (x - y) (x + y) and using the pattern below to help you, work out how ?+? = 123
基于上面那則智力測(cè)試的解題邏輯：“x + y = (x - y) (x + y)”，并利用下面這些算術(shù)模式，算一算“?+? = 123”。

6 + 4 = 210
9 + 2 = 711
8 + 5 = 313
5 + 2 = 37
7 + 6 = 113
9 + 8 = 117
10 + 6 = 416
15 + 3 = 1218

答案：

If you split the answer of 123 in two: you get two numbers 1 and 23
把123分成兩部分，可得1和23。

To work back to what the numbers in question are, you need to work out two numbers where the second subtracted from the first makes 1 and also both added together makes 23.
想要倒推出原題中的兩個(gè)數(shù)字，你需要保證數(shù)字一減去數(shù)字二等于1，而且它們相加等于23。

YouTuber Talwalker called the first number in question x and the second number y.
“Talwalker”已將“?+?”中的兩個(gè)數(shù)字依次命名為x和y。

Using these and the numbers 1 and 23 split out of the answer delivers:
帶入算式并附上1和23兩個(gè)結(jié)果，可得：

x - y = 1
x + y = 23

This corresponds to:
于是得出：

12 – 11 = 1
12 + 11 = 23

Write them together and you get 123, as in the brainteaser question which is written 12 + 11 = 123
兩個(gè)結(jié)果放在一起即123，按照原測(cè)試的規(guī)則寫(xiě)出來(lái)就是“12 + 11 = 123”。

運(yùn)算過(guò)程：

x - y = 1
x + y = 23

We can add these two together, which would be written out like this (x-y)+(x+y)=24
將上面兩個(gè)等式左右相加，可得“(x-y)+(x+y)=24”。

In this equation we have 2x and no y, so:
左邊運(yùn)算結(jié)果為2x，y已相互抵消，于是我們得出：

2x=24

That means that x is 12, so using the first formula:
所以x等于12，在利用之前的第一個(gè)等式：

12-y=1

That means that y is 11.
所以y等于11。

Write these numbers in the style of the brainteaser and you get 12+11=123
仿照測(cè)試中的寫(xiě)法，可得“12+11=123”。

Vocabulary
boffin：科學(xué)家；科技理論家
brainbox：絕頂聰明的人

英文來(lái)源：每日郵報(bào)
編譯：杜娟