Interesting smart questions

 

Assume that the probability of a meteor to be seen in a month is91%. What is the probability of seeing a meteor in half a month ???? Some say 91%, some are 70%, and 70% is: the probability of a meteor coming out every night is X The probability that a meteor does not come out in a month is ( 0.91) ^ 30 = 1-0.09 =
The probability of a meteor not coming out in half a month is (0.5) ^ 15 = (0.3) ^ 30 ^ =
The probability of a meteor is 70% in half a month. You have10 barrels of gold coins. One bucket of gold coins is fake and 100 grams less than normal. Each bucket contains 1000 grams of normal gold coins. You have a scale, how can I tell which bucket of gold coins is fake at one time? Solution: To 10 barrels of gold coins, from 1 to 10. Then take one from 1st barrels, two from 2nd barrels, three from 3rd barrels ...... Then it is called weight. If all the gold coins are real, they should be (1 + 10) (10)/2*1000 grams. If it is light, the bucket is fake. MinghuaI bought a chicken for 8 yuan, sold it for 9 yuan, bought it for 10 yuan, and sold it again for 11. How much did I earn? Possible answers and analysis are as follows:

1. Initially only8 RMB. You have 11 RMB in the end, so you earn 3 RMB.

2. for the first sale, the hero lost 8 pieces, one chicken, and the second sale. The hero lost 9 pieces and one chicken. For the third sale, the hero lost 10 pieces, get a chicken; the fourth sale, the hero got 11 pieces, the loss of a chicken, so the overall GDP is 38 yuan plus 4 chickens.

3. There are three transactions in the entire incident. Let's take a look at the specific three transactions?

First transaction: 8 yuan to buy, 9 yuan to sell, profit 1 yuan;
Second transaction: 9 yuan for sale, 10 yuan for purchase, profit-1 yuan;
The third transaction: 10 yuan to buy, 11 yuan to sell profit 1 yuan;
The entire process: 1-1 + 1 = 1 RMB
Therefore, the analysis shows that this person is an SB, because the last two transactions are equivalent to a dry job.

The profit of the test answer is RMB 2, which must be the failure of the interview;
It is even more stupid to answer the question of 3 yuan, because I do not know when to add the cost, it is certainly a failure;
Congratulations! You are not in the SB scope;

The result is: I could have earned 3 RMB directly. After three transactions, the profit became 1 RMB,
So the correct answer is:-2 yuan!

Answer: 2 RMB. The interview is successful !!Ten dollar coinsThere is a fake coin in it. There is a balance. Which of the following steps can be used to find out which coin is fake?

 

A netizen asked the following interesting question:YesThree people went to sleep for 30 yuan a night. Three people paid 10 yuan each and paid 30 yuan to the boss..
Later, the boss said that only 25 yuan is enough for the discount today, and the waiter will return the 5 yuan order to them.,
The waiter secretly hid 2 yuan, and then assigned the remaining 3 yuan to the three,
1 RMB for each person.
This way,
At first, each user paid 10 yuan, and now 1 yuan is returned, that is10-1 = 9,
Each person only spent 9 yuan, 3 people 9 yuan per person,
3x9 = 27 yuan + 2 yuan hidden by the waiter = 29 yuan,
Where else is there a dollar ???A: The original question is a simple financial question. After we put the incoming and outgoing accounts together, you are very clear about the points, so there is no problem. A total of 27 yuan, remove the boss's 25 yuan, the remaining 2 yuan to the guy, where is the 1 yuan?

Both Xiao Ming and Xiao Qiang are students of Mr. Zhang. His birthday is m month n, Both of them know that Miss Zhang's birthday is one of the 10 groups below, Instructor Zhang told James about m and John about N, Teacher Zhang asked them if they knew his birthday was that day? July 3, March 4Month5Day3Month8Day ** Day 6Month7Day September 1Month5Day December 1 December 2Month8Day James said: If I don't know, I'm sure I don't know either. Xiaoqiang said: I didn't know either, but now I know. James said: Oh, I know. Determine the day of Miss Zhang's birthday Based on the conversation above.

This is determined based on the M, N values in Xiao Ming and Xiaoqiang. the set value in Xiao Ming's hand must be one in the previous set, and the set value in the strong little hand must be one in the second in the previous set.

based on the current collection of James (January March 4, January March 5, January March 8, January September 1, september 5 ). the set value in Xiaoqiang is only one of the above sets. But he said I knew it. How does he know it? He knows it based on the N value in his hand. So the N value in his hand cannot be 5. The birthday of a teacher can only be determined by a strong such as 4, 8, and 1.

James says he knows. It means that the m in his hand cannot be 3, because it is determined by 3 to be two values, so the m in his hand should be 9. therefore, the instructor's birthday is October September 1 . More: http://wenku.baidu.com/view/402a8750ad02de80d4d84065.html

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