This is a mathematics challenge. It has the way of saying a thing below,

一項數學挑戰   動動腦 激盪一下吧 !

這是項數學挑戰！有這麼一種說法：

If you are a engineer,you should be unclock this subjest within 3 minutes or... 30 secs. But if you are an architect,give you 3 hours.

If you are a doctor,give you 6 hours. You're an accountant, 3 months maybe...    Or if you are a lawyer,we think you should be never unclock it,never..

你若是工程師，你應該可在三分鐘內（３０秒左右吧）解開這道題；你若是建築師，
給你三小時；你若是醫生，給你六小時；你若是會計師，三個月吧∼假若你是律 師，大概永遠也解不出來。

Supposing you are good at mathematic or logical questions,unlock this challenge and the password will be the correct answer.

Open the attach file please,then add your name into the eminent name list.

問題如下：空格中的數字為？

1, 2, 6, 42, 1806, ____???

我過五分鐘才解出來，聽說他五秒鐘就OK~

這就是 高才生 跟 專科生 的 差別嗎?