急！！求助2道数学狗！！！

angela19901003

1.   总共有352还是356个人 反正是350多 6月比其他月份出生的人都多 问6月至少出生多少人？
很多答案都是32  为啥我觉得是31啊。。。用那个数除以12等于29然后余一个数 我觉得有些月出生29人 有些人出生30人 6月出生31人就能比其他月份多了呀 为啥是32？

2 一个2位数 个位是5    哪个可以确定下次数  (1) 这个数的平方的千位是1  （2）这个数平方百位是2
据说选A 我数学不是很好真的不大会。。。求教！！！！

yiw006

awesome ! thanks!

sdcar2010

This is similar to voting in an election or gambling in Las Vegas: Stick to the same strategy ALL the time.

If you first spread 29 people evenly among 12 month, you should spread the extra 4 people EVENLY among the months AGAIN. Plain and simple. What you get is a few months with 30 people. Then the smallest possible number for June to become the most popular month is 31, just one extra than the rest.

Remember, your goal is to find the LOWEST possible number for June to win the contest.  So do not pile up extra people in any month other than June.  Spread them out!

yiw006

then can you please explain??
i am totally lost

sdcar2010

LS, according to your logic, I can put 175 in January alone and leave 177 in June.

To get the smallest possible number in June, one should try to put the number EVENLY among other months, not try to create some extra hurdles (such as creating a month with 31 people).

yiw006

LS:

ie:  according to you...... here June won't be the month that has the most people in which they were born.

J    F   M   A  M   J   Ju  A    S  O   N  D
29 29 29 29 29 31 29 29 29 29 29 31= 352  

( option of the remainder 4 can be split to  1 1 1 1 , 2 2  and 1 3)

BUT...

J    F   M   A  M   J   Ju  A    S  O   N  D
29 29 29 29 29 32 29 29 29 29 29 30= 352  

This satisfy the condition that June has the greatest number of people in which they were born.

sdcar2010

No.

WHAT IS the minimum number of people that born in JUNE?
Answer: 0

WHAT IS the minimum number of people that born in JUNE to make the number of people born in JUNE the greatest among all 12 months?

31

yiw006

I think the original question may be this

" WHAT IS the minimum number of people that born in JUNE.?"

條件是：出生在六月的人數是 十二個月份裡最多的

總數 356 人

356/ 12= 29 余 四

所以 剩下的四個人有幾種分法

1 1 1 1

1 2 1

2 2

1 3

怎樣才能保證六月的人數是最多的呢？ 29+3=32

anyone????????

junyihuo

（1）是31，如果中文意思对的话

（2）的话，就一个一个试，是最快的方法，有可能是唯一有效的。25的平方是625，35的平方是一千多，45的平方是两千多。所以条件（1）可以确定此数是35

angela19901003

Agree. Thirty-one is enough.

-- by 会员 sdcar2010 (2011/3/10 20:05:41)

恩恩 我一直都觉得是31  可是很多人都是选32  好奇怪啊 而且好像他们说的都很有道理。。。看你老回复我帖子 谢谢呀 嘿嘿 我之前还发了个余数的都木有人回。。。帮我看看吧。。。