What weird math problems have you ever seen?

That time I looked at my cousin's Olympiad problem book, and I saw a question that Mengmeng's beloved 3x3x3 Rubik's Cube fell into the septic tank, and Mengmeng picked it up and disassembled the Rubik's Cube, picked up a piece at random and put it in her mouth, what is the probability of not being hit?

When I was tutoring elementary school mathematics, there was a chicken-rabbit cage problem, that is, set x and then bring it in to ask for the result, I did it for a long time without making it, and finally took a closer look, I was asking how many feet the chicken has and how many feet the rabbit has.

A column 100 meters long is marching, the herald goes from the head of the platoon to the end of the platoon, and from the end of the platoon to the head of the platoon, this column is exactly 100 meters long, and the speed of the known team and the speed of the herald remain the same! Q: How many meters did the herald walk?

Math can have something to do with aliens, and it's also drunk. In this title, four patterns are given above, saying that they are aliens. Four more patterns are given below, saying that it is not an alien, and then let's judge which one is an alien.

How much is six divided by one plus two in parentheses, don't look at it as such a simple question, but there are really millions of people who are wrong.

Four inverted triangles are given, and there are small triangles inside the triangles, and if you don't look carefully, you think it's counting how many triangles there are, and it's not as simple as we think.

Since I was a child, I was stumped by a strange math problem, and the swimming pool has three water injection pipes in A, B and C, which is really a headache.

The Primary School Olympiad is really simple.

The first picture: 366 50 = 70 more than 16 or 366 70 = 50 more than 1636? -16=？0, so a must be 6,366-16=350 and b c=35.

Figure 3: Any three of the 7 numbers add up to 12, and there are 147,156,237,246,345. Only 4 appears three times, so it's 147,246,345

The second picture: The skill will not be, just count it honestly, there are not many of them.

Isn't it strange that chickens and rabbits are in the same cage?

The second question is an integer part 1, and the middle of the third question is 4, and the rest know how to fill it in, right? Question 1: Aren't all the numbers in the square the same?

Question 2: 10 1 19<1 10+1 11+....+1 19<10 1 10 = 1, the original formula is between 1 and 2, and the third question is based on a property of the equal difference number series 1+7 2+6 3+5, so the three straight lines are filled in 174 264 354 respectively

The fifth Olympiad can be solved by children during the summer vacation of the fourth grade.

First use (2001-2) 12=166......7, and then count from the position of the snake to the left to the 7th position, we can see that the year 2 AD is the year of the dog.

The first one goes to 1, the second one can only go to 100, and there is one.

One takes 2, the second can go 99 100, there are 2 ways to prevent duplication, the first one takes 51, the second one can't take 50, can take 52 53....There are 49 species out of 100.

And so on, there are 1+2+...49+50+49+48+..1=2500

x+y》=100 x,y belongs to 1,2....100 x is not equal to y, and the answer can be obtained by linear programming by counting grid points on a coordinate system.

There are 31 days in May, 30 days in June, and 1 day on July 1, for a total of 31 + 30 + 1 = 62 days.

62÷7=8……6 Sunday.

Tuesday, 1 May 2007, Sunday, 1 July 2007

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