[輕鬆時間]有獎問答+派包 (含福利)

Day 1,329, 03:25 • Published in China China • by Crazy Hin

20級以下新人v+c

每人5個自產q2包包
補充一下戰事物質


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第1位回答以下題目 而且答案正確 將獲100個小小的Q1包+5坦克
附上步驟再送10坦克

1.

求a+b


2.
Ｘ和Ｙ是正整數
１＜Ｘ，Ｙ＜９０
Ｐ知道Ｘ乘Ｙ
Ｓ知道Ｘ+Ｙ

Ｐ：我不知道Ｘ同Ｙ是甚麼
Ｓ：我當然知道你不知道
Ｐ：啊！我知道Ｘ同Ｙ係甚麼了！
Ｓ：咦！那我也知Ｘ同Ｙ是甚麼了！

問:Ｘ同Ｙ分別是甚麼咩數字？


3.

Using only elementary geometry, determine angle x. Provide a step-by-step proof.

You may use only elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.). You may not use trigonomery, such as sines and cosines, the law of sines, the law of cosines, etc. There is a review of elementary geometry below.

This is the hardest problem I have ever seen that is, in a sense, easy. It really can be done using only elementary geometry. This is not a trick question.
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福利時間