# mathematics's questions - Chinese 1answer

2.124 mathematics questions.

### 7 Matchstick Puzzles

6 answers, 507 views mathematics geometry matches
Puzzle #1: There is a matchstick: | Add 2 more matchsticks to make the number, 11. Puzzle #2: There is a palace made out of 11 matchsticks: Move 2 matchsticks to make 11 squares. Puzzle #3: ...

### -1 Move one thing in the equation [on hold]

$1484 / (7 / 9) = 19$ Make the equation true by moving one continuous shape or operation in the equation.

### 8 Distinct digits but Close Enough

Using the digits from $1$ to $9$, Form four numbers, such as ($X$,$Y$,$Z$,$T$) Then take $X\div Y$ and $Z\div T$ where both values should be different than each other. You need to use all digits ...

### 9 Form the biggest squaring number

1 answers, 263 views mathematics formation-of-numbers
You are going to start from any number with distinct digits lower than four digits (such as $a$, $ab$, $abc$) and you will apply the rule below: Take the square any number you want in the number (you ...

### 114 The Sheikh dies

8 answers, 17.446 views mathematics lateral-thinking
The Sheikh dies, leaving behind three sons, 17 camels and the following order: His oldest son shall inherit one in two camels. His middle son shall inherit one in three camels. His youngest son shall ...

### 10 Rabbits, wolves and lions in a magical forest

I was told this problem comes from Poland's biggest math competition for high school students from the year 2014. I am not sure of the answer but I am sharing since someone here can probably shed ...

### 110 Paying the Troll toll

You are on your way to visit your Grandma, who lives at the end of the valley. It's her birthday, and you want to give her the cakes you've made. Between your house and her house, you have to cross 7 ...

### 7 A natural system of equations

2 answers, 196 views mathematics rebus
What goes in the question mark? (Same for both equations). It is something very well-known. Hint:

### 2 A Maximising Puzzle Gift for my Girlfriend and I's 28th month Anniversary

6 answers, 199 views mathematics calculation-puzzle

### 3 2019 is coming!

Use $2$ $0$ $1$ and $9$ to make the numbers $66, 74, 76, and$ $77$ RULES You must use all 4 digits. Only the digits 2, 0, 1, and 9 can be used. You can make multi-digit numbers out of the numbers. ...

### 11 No love for 2 and 3

8 answers, 1.712 views mathematics lateral-thinking
Form two numbers. The sum of them must be $100$. For the first one you must use the digits $4$, $5$ and $6$ taken exactly once in this order. You cannot use other digits. For the second one you must ...

### -2 How many are they, how much do you owe them? [closed]

2 answers, 112 views mathematics construction
Let's suppose you want to build a house. To do this, you're going to need people to help build the house. Specifically, you're going to need contractors, engineers, and construction workers. After ...

### 4 Make 6 5 4 3 = 1

Can you find a way to make: 6 5 4 3 = 1 by concatenation and/or adding any of (and only) these mathematical operators: + - × ! ÷ ^ standard parentheses () You cannot add other numbers to the ...

### 5 Simple Arithmetic Puzzle 6. Or is it?

2 answers, 188 views mathematics enigmatic-puzzle knowledge
Here's a sixth one! (with a twist) \begin{align}16&=\boxed9\times18\\5&=13\times\boxed3\\?&=9\times20\end{align} Can you find the value of the question mark? HINT 1:

### 1 Find the next number in order [closed]

1 answers, 86 views mathematics number-sequence
Find the next number in the sequence 9, 73, 241, 561, 1081, 1849,____

### 18 The 8-dimensional vegetable kebab

4 answers, 1.750 views mathematics combinatorics
You are given two of each from the array of 8 vegetables numbered 1 to 8 as shown above. So in total you have 16 veggies(8 pairs). Your task is to make the longest kebab (sequence of vegetables ...

### 5 How many apples should you carry? [duplicate]

You are on your way to your friend's house. You decide to carry 2 apples to your friend. To get to their house, you must pass across 8 gates. At each gate, the keeper will take half the amount of ...

### 14 Use 2 0 1 and 8 to make 67

Use $2$ $0$ $1$ and $8$ to make the number $67$ RULES You must use all 4 digits. Only the digits 2, 0, 1, and 8 can be used. You can make multi-digit numbers out of the numbers. Examples: 20, 82, ...

### 3 Move one shape in the equation [closed]

$1484 / (7 / 9) = 19$ Make the equation true by moving one continuous shape or operation in the equation.

### 22 Maths equation: 357568588-11 = ~357568584.858

Move one line and make this true: $357568588-11 =$ ~ $357568584.858...$ No cross through the "=" sign stuff. Hint:

### 4 Use 2, 0, 1 and 8 to make 71

Use all and only the digits $2,0,1,8$ once each to make the number $71$. Allowed operations; anything not on this list is banned: $+,-,\times,\div, ()$ (parentheses and/or choose function) ...

### -3 greatest and least possible values of median in a set [closed]

1 answers, 48 views mathematics arithmetic
Let Q = {1.7, 1.1, 1.4, 2.1, 2.3, s}. What is the absolute difference between the greatest and least possible values of the median of set Q? Express your answer as a decimal to the nearest hundredth. ...

### 9 Crack the 5 digits code

I created this "crack the code" puzzle. I hope the members here like it.

### A maths function

I am using a function, and the outputs are below. What function am I using? function($0+0$) = 0 function($73942856-628529469252$) = -1 function($1 + 1$) = 1 function($1+2$) = 1 function($528^0$) =...

### 4 Fix the perfectly ordered equation

3 answers, 164 views mathematics logical-deduction
This question is follow up to Something is wrong with the equation This time our numbers are given as below included each numbers on a keyboard order and some basic math operators next to each other ...

### 1 A short and simple riddle

3 answers, 461 views riddle mathematics
One day, while playing Minecraft, a player ran at full speed up to a tree and dug into the ground. There, they found a mysterious note. It said: I am a thing. If you do something to me, and then do ...

### 9 Something is wrong with the equation

3 answers, 313 views mathematics logical-deduction
There is something wrong with the equation below: By just exchanging two squares at a time, find the equality with the least amount of exchange. For example if this question is asked for below ...

### 3 Puzzle #6: Brain Coaster

A carnie who is an extreme fan of mathematics was asked a strange question by a university student. The student asked how many rides were there total in this amusement park. The carnie, being polite, ...

### 15 Make 4 4 4 4 = 30,31

7 answers, 3.351 views mathematics formation-of-numbers
Follow up question to Make 5 5 5 5 = 19 Can you find a way to make: $4\ 4 \ 4 \ 4 = 30$ and $4\ 4 \ 4 \ 4 = 31$ by adding any operations or symbols on the left side of the equations? You can ...

### 8 Mathematical puzzle: ten digit lock number

A mathematical professor set his lock number, he used mathematics so he would remember the ten digit code. He used all of the numbers from 0-9, every number only once. In his mind the first two ...

### 24 Unsolved Mysteries: Magic Square of Squares

This is the first in what will hopefully be a series of Unsolved Mysteries posts. Note that this puzzle has no known solution, nor any proof that a solution is impossible. We will see how ...

### 4 A story reminiscent of something

2 answers, 105 views mathematics wordplay enigmatic-puzzle
An old Russian mathematician once told me this strange story... “In a galaxy far away there is a civilized species. The skin colors of everyone in the species is blue or green. Among the ...

### Help me visit my friend through his new digital key lock [duplicate]

0 answers, 39 views mathematics combinatorics
A friend of mine whom I have repeatedly tried to visit has upgraded his house‘s security system. Instead of using doorkeys which were quite easy to borrow, he‘s using one of these fancy new electric ...

### 4 Writing numbers puzzle

6 answers, 2.688 views mathematics formation-of-numbers
How do you write 23 using only the number 2? 34 using only the number 3? 56 using only the number 5? 100 using only the number 9? You can use only the numbers said, but any math you want in order ...

### 10 Maximize the number of factorials in your solution to 6 5 4 3 = 1

Using the same rules as Make 6 5 4 3 = 1, but maximize the number of factorials. You may not take the factorial of 1 or 2. This is harder than it looks. A great answer has six factorials, an ...

### 11 Make 6 5 4 3 = 81

Can you find a way to make: 6 5 4 3 = 81 by concatenation and/or adding any of (and only) these mathematical operators: + - × ! ÷ ^ standard parentheses () You cannot add other numbers to the ...

### 6 Color of the bear

9 answers, 3.588 views mathematics physics
A bear fell from a height of $10$ metres from ground. It reached ground in $\sqrt2$ seconds. But somehow, it didn’t get hurt. What is the colour of the bear? Note : There is no ...

### 22 Make 5 5 5 5 = 19 [closed]

Can you find a way to make: $5\ 5 \ 5 \ 5 = 19$ by adding any operations or symbols? You can use only these symbols: $+,\ -,\ *,\ !,\ /,\ \hat\, ,\ ()$. It is limited to this list, and ...

### 8 Find the word with the highest normalized product of letter-prime values where A=2, B=3, C=5, …, Z=101

5 answers, 765 views mathematics word
Which word has the highest normalized score according to the following: Assign each individual letter A..Z of an (English) word a value corresponding to the n'th prime (see table below). Take the ...

### 32 Unsolved Maths Problems as Puzzles

On an internal wiki at work, people sometime post puzzles similar to those found on this website. Most of the questions are formulated as a story or word problems, but can be expressed mathematically ...

### 33 Can political debates really work?

9 answers, 4.586 views mathematics combinatorics
In the far-off country of Politica, there are three main parties: the Left, the Right, and the Centre. In the last election, there were 19 million Left voters, 21 million Right voters, and 23 million ...

### 41 Can you make 1 1 1 1 = 5? [closed]

10 answers, 20.459 views mathematics formation-of-numbers
Can you find a way to make 1 1 1 1 = 5 by adding any operations or symbols? You can use symbols such as these: +, -, *, !, ^, (). It is not limited to this list. Good Luck! P.S. You can not add any ...

### 4 Gotta Catch 'Em All!

As I got ready for work today, I had my television on Netflix as I always do. See, the thing about Netflix, they auto-play trailers for the item that is currently in focus. Well, after starting my ...