# Questions tagged [no-computers]

A puzzle designed to be solved without using calculators, online decoders, or computer programming. Using a computer to type and post the answer is allowed; the spirit of this tag is to make people solve the puzzle on their own.

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### Alice and Bob Alphametic

Let me tell you a story about Alice and Bob. When they are together it's all fun and games, we know that. But what happens when they are not together? I'll tell you. Alice has an odd feeling. It might ...
67 views

### Rep Digit Palindrome expressed as a Unique set of Pan Digital Relations

Allowed Operations: Addition, Subtraction, Multiplication, Division, Exponentiation. Right and Left Bracket use permitted. Express $2222$ In $2$ Different ways using all the digits 1 to 9 only ...
179 views

### Tiling rectangles with Heptomino plus rectangle #7

Inspired by Polyomino T hexomino and rectangle packing into rectangle See also series Tiling rectangles with F pentomino plus rectangles and Tiling rectangles with Hexomino plus rectangle #1 ...
494 views

### My Friend, 4 kids and gold and silver coins

The other day I met an old college friend in a coffee shop. We both were students in the Math department of that college. Here was our conversation (after the small talk) We are meeting first time ...
142 views

### Solve the magic square

My friend gave me the following magic square to solve $$\begin{bmatrix}\frac23&5&?\\\frac19&?&?\\?&?&?\end{bmatrix}$$ I can solve it. Can you? You must provide logical ...
128 views

### Find a factor #1

The series of Find a factor puzzle is started by Culver Kwan, and asks the solver to identify a factor of a certain large number within a certain range using some mathematical identities. This should ...
195 views

### Especially Special

Here's a special and interesting chess problem that I came across the other day. As usual, no using a computer and no Googling or anything like that for the solution. You must use your own brain ...
498 views

### Solve for the Number in the number..square..cube relationship

Each letter stands for a distinct digit...no computer or calculator needed. Just pure logic and some mental multiplication. CUBE is a concatenated number and it is a cube. X denotes multiplication. (...
933 views

### solve this 8-puzzle

This quiz is about the 8-puzzle. It is a board with 9 fields. There are 8 tiles with numbers from one to eight. One field is empty. You can slide numbers around the board: But only numbers next to the ...
84 views

### Lady Luck Powers Up Every Member to Sum Upto Non-Prime Number. Who am I?

$Given:$ UV, WX, UVCUVWX, are concatenated Numbers. U, V, C, W, X are distinct digits ( zero to nine ). $Relationship:$ $UVCUVWX$ = $U^7 + V^7 + C^7 + U^7 + V^7 + W^7 + X^7$ $Clues:$ 1) UV ...
123 views

### I like to stuff things in my gut

What am I? I like to embrace pretty much everything in life, And I am obsessed with a popular essential oil. I chew on gum pretty much all day, And don’t drink a lot of water. I like to stuff things ...
143 views

### How many answers are there to this alphametic?

If you take a problem of the form: abc +def ---- ghij where each letter must be replaced by a different digit (that is, all digits, 0-9 must be used once), how ...
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### Figure out this Four digit Palindrome with two distinct digits and

The sum of the digits of the palindrome is Same as the number remaining after last two digits are removed.
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### Devil goes Pan Digital..Sometimes Lucky..Sometimes not..Figure him out

$Given$: D, E, V, I, L, G, N, O, T are distinct digits (1 to 9). $D+E$ brings good luck $I+L$ is unlucky $N+O-T$ is unlucky too. $DDDD$ = $(D+E)^V$ + $(I+L)^G$ + $(N+O)^T$ Fully Figure out ...
97 views

### After seeing my 16xxxx16 sequence puzzle, my Younger sibling wants to get into the act and give a little puzzle of his own

In our Reptand prime family, as you know, everybody has our own signature Cycle length. My younger sibling unit has shorter cyclic period and he wanted to create little puzzle for you. He truncated ...
105 views

### Unravel this simple cryptic Unique NUMBER relationship

Find GC ...it is a concatenated number Given: N + U + M + B + E + R = GC
121 views

### A Fairly Simple Equation #2

I got a lot of positive feedback on my last puzzle, A Fairly Simple Equation (even though it was apparently a lot easier than I thought it would be!) So, I've got another similar puzzle. General ...
139 views

### Probability of a successful DT Cannon

In multiplayer Tetris, there are a number of opening setups that let you send powerful attacks very quickly. One popular opening is the DT Cannon, which allows the player to very quickly send a T-Spin ...
93 views

### Express the given Fractions as Continued Fractions

Using only the numbers, $1$, $2$, $12$. No concatenations allowed. Only permitted signs are plus and division. Brackets are not needed. Expressions should be as concise as possible. Typical ...
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### A Logician's Game of UNO Flip

Two players are in the middle of an ongoing one-on-one game of UNO Flip, with all its standard rules in effect. Play is currently Light Side Up. It is Player B's turn. Player A has 3 cards remaining, ...
126 views

### Confusing letter

I once received a letter where all letters of the alphabet was shuffled around. The task was then to find out what each letter was and then read the letter. I wrote a little letter for you: Be ...