Questions tagged [no-computers]

A puzzle designed to be solved without using calculators, online decoders or computer programming. You're still allowed to use a computer to post the solution; Stack Exchange doesn't support smoke signals yet.

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1answer
76 views

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.
7
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2answers
190 views

Puzzling Knight has a Message for all- Especially Newcomers

Of all the more than a Trillion messages he can deliver, he has especially selected this message for all. Follow his(normal chess moves for the Knight) path to get the message. His journey starts ...
13
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1answer
205 views

No Halves Hath the Heptagram

Here is the heptagram: Rules are the same as for the octagram. However, the heptagram has the very nice property that all words are unique. I.e., as you go around, you will not encounter any ...
2
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1answer
126 views

Deduce Distinct Digits of the Given Fibonacci Sequence- Detail all Steps

$DEPUS$ $SRST$ $UDQD$ $CTQU$ $DTPR$ $PQR$ $SDE$ $VRR$ $CVV$ $DUU$ $QP$ $TT$
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1answer
192 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 ...
3
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1answer
185 views

Valiant Knight is back..but he is in grave danger from the Evil Queen

King has placed a bounty on Valiant Knight and enlisted his evil queen’s help. Queen knows knight’s regular stops of his journey and knows he goes through all odd prime cells. She strategically ...
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1answer
91 views

Strange? Primes and Palindromes have no business being in this Place?

$1$ $1$,$2$ Good easy start $1$,$2$,$4$ As expected $1$,$2$,$4$,$8$ I know it is going to be easy $1$,$2$,$4$,$8$,$16$ why is he giving this? I got it! $1$,$2$,$4$,$8$,$16$,Prime ...oops!.....
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1answer
87 views

How do you make Prime “COMPUTERS”?

$Given$: $COMPUTERS$ is the smallest Pan Digital containing all the digits 1 to 9 occurring only once. $COMPUTERSV$ is a Prime only when one of the correct digit ($V$)is added at the end. Also, $...
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2answers
259 views

Listen to my Story…Let us find the Unique Invisible Pan Digital Pair

I was an avid reader of Popular Science magazine. In the last page or so, they usually had visual clues without words to make useful stuff. I always wanted to create a mathematical puzzle like that ...
7
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2answers
305 views

Square Spin #2: Climb the Mountain!

Square Spin History: #1>#2 New Rules This puzzle introduces two new square types: Unmovable squares (Un) Replaceable squares (Re) Plus the concept of ambiguity! Ambiguity of squares Certain ...
2
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1answer
109 views

All Aboard..Hop onto the Power Train to reach Destination Unity

Your goal is to reach the destination unity. starting from $3462$ with three intermediate stops. You are allowed to use only 2 mathematical operations..multiplication and Exponentiation. All the ...
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4answers
551 views

The Football Squad

The sixteen players of a football squad, wearing shirts numbered 1 to 16, have arrived in town for a tournament. At their hotel, they are assigned 16 rooms consecutively numbered. Moreover, each of ...
2
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1answer
81 views

Primes from the Pan Digital

Pan Digital Number is the smallest with all the digits 1 to 9 with no repeats. When looking forwards or backwards, eleven Primes can be extracted from that number preserving the same sequence. Among ...
5
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1answer
151 views

Kill me or I kill you first!

How many mates are possible under 10 moves? Rule: Mate can go both ways. Under 10 moves. Feel free to let White or Black move first. Board diagram: Apronus PGN Viewer board for white taking the ...
6
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1answer
163 views

Down The Board-Selfmate In 10 Moves

Here's a miniature selfmate puzzle that I composed today. I just got an idea and I managed to successfully create it. I got the basic idea down to just 9 pieces, none of which are promoted. It's ...
12
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1answer
476 views

Resolve this Fibonacci Relationship

$Given$: $A$, $B$, $C$, $E$, $F$ are distinct digits varying from $1$ to $9$. $A$ is a Fibonacci number. $BB$, $BC$, $EF$ are concatenated Numbers. $Relationship$: $(A*BB)*(BC)^2$ = $(EF)^2- B$ ...
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2answers
743 views

Step into the Octagram

The diagram below shows a partially-filled "octagram". Step into it, if you dare! At every vertex in a long word. Flowing into every vertex are two short words. Anagrammed together, these two short ...
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1answer
84 views

Professor Clark’s Precious Chemical Connections

They are primarily eight precious ones. Fill in the X s with appropriate letters to reveal all the 8 Precious Metals. Each X represents a letter. 1,5,7..vertical. 2,3,4,6,8..horizontal
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1answer
110 views

Take out one Third..Keep Two Third..To Total Ten

There are total 36 numbers in the grid shown in the picture. Cross out 12 of them and keep 24 of them. Sum of the rest of the numbers should total 10 for each row and column.
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2answers
88 views

It is not as Simple as it Looks to get the right Alignment

Of these US Coins (Quarter and Dime Combo). Initial arrangement of the coins as shown in the picture is as follows... Q D Q D Q D Q Objective is to attain the final configuration... Q Q Q Q D D D. ...
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1answer
76 views

Give these Digits their own Place..Place them Right

In their own Circle. Such that the arrows point to successive numbers . Start with 1 and end with 9. There might be more arrows than necessary. Find the solution with least number of arrows ignored.
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1answer
531 views

Professor Roman gives unusual math quiz ahead of

His usual Monday Morning 8am class. This is for extra AAA credits. $A$, $B$, $C$ are distinct digits. $AA$, $BA$, $BBAAA$, $CBBBAB$ are distinct numbers. Please deduce these with concise reasoning ...
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1answer
124 views

Perfect Powered Relations - Please Figure them out

$D$, $E$, $F$, $G$, $H$, $S$, $T$, $U$, $V$ are distinct digits and can vary from 0 to 9. $DE$, $FGH$, $ESDE$, $SS$, $ST$, $SU$ are all concatenated Numbers. From the given Relations below, deduce ...
6
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2answers
370 views

Go Get the Six Six-Pack

And fill with right Mathematical operands and enjoy. Six Relations shown in the pictures are missing the right operands. You can only use plus, minus, multiplication, division signs in between the ...
5
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1answer
150 views

You versus Computer - Who will be the Winner?

You sit down to play a “new” game of chess. In this game only one Knight is on the regular 8x8 chessboard. Only regular legal moves of Knight are allowed. Game begins with computer going first to ...
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1answer
64 views

Deduce the Missing Digits from the given Relations

Picture shown below contains 3 horizontal and 3 vertical relations. Digits to be filled vary from 1 to 9. Order of operations is given following the arrows vertically and horizontally.
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2answers
127 views

Be Quick and Calculating..Take Four Shots

To Target Sum of 100 Exactly . By shooting the right different numbers in four shots summing upto 100.
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1answer
117 views

Red and Blue Dividing Line

In the grid shown below, 20 numbers are given in blue and red. Draw a dividing line along the contours of the grid such that A) Blue Numbers Sum to the same on both sides of the line B) Red Numbers ...
4
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2answers
441 views

To Win The Right To ****************

I found this nice little problem on Tim Krabbe's website the other day. I found it so unique and beautiful, that I felt compelled to share it here as a puzzle to be solved. Please do not use a ...
2
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1answer
146 views

Mystic Island Math - Can you Figure it out?

On Mystic Island math is done via symbols. Distinct symbols represent distinct digits, varying from 0 to 9. From the picture below, figure out the corresponding digits. Please provide your reasoning....
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2answers
143 views

How do you Solve an Age-Old Problem? [closed]

Mansion has a son (Mark) and a daughter (Mindy). Mark is older than Mindy. Five years ago, Sum of Mark and Mindy’s ages was twenty two. Five years from now, Mark will be exactly twice as old as Mindy....
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3answers
146 views

Be a Wordsmith — Assemble enough words to score 50 from the Triangular Settings [closed]

Use this triangular setting of letters to form as many words(minimum length 5) as possible, following the given rules. You can start at any letter, follow the connected lines to pickup additional ...
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1answer
96 views

Express 50 to 100 with constituent digits only…my 100th pzl on 50th day

Using the following rules only, Express the numbers from 50 to 100 using only digits in the number. Concise with minimum number of characters is preferred. No concatenation of numbers allowed. Only, ...
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2answers
153 views

Find the “X “in the Box

Interlocked Rings shown in the picture share a common sum of 28. The numbers to be filled vary from 1 to 12 and do not repeat. Already four numbers..8, 9, 10, 11 are placed. Fill the X s with rest ...
13
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2answers
784 views

Hit the Bulls Eye with T in the Center

There are 3 Rings with “T” in the center. In each ring, letters are distinctly different - 16 in the outer, 8 in the middle, 4 in the inner rings. Hit the Bulls Eye by making sixteen different four ...
9
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3answers
4k views

Too early in the morning to have SODA?

Each letter shown represent distinct digit...can vary from zero to nine. $COCA$, $COLA$, $SODA$ are three concatenated numbers. Figure these out from the following relation: $COCA + COLA = SODA$
3
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1answer
169 views

Normal Knight sees the Big Picture during his Countrywide Travels [duplicate]

Normal Knight is savvy, energy saving as he travels through Regular Country... Ride along and Document Details of his Journey As this Knight (only chess move allowed) journeys through , he takes ...
9
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1answer
213 views

One to Eleven Sum to Twenty Five

From the picture shown below, deduce the missing numbers (one to eleven)... none of them repeating. Four Numbers surrounding the Five diamonds A, B, C, D, E, as well as the five numbers in the outer ...
17
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2answers
716 views

The Amazing Sliding Crossword

Solve the crossword then slide the blocks to create another configuration with eight new words. Across 1. Lure 5. Before long 6. Frosted 7. Permit Down 1. Scold 2. Formerly 3. Frost, for ...
4
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1answer
162 views

Prime Knight travels through Prime Country

Prime Knight travels through Prime Country... Ride along and Document Details of his Journey As this Prime Knight (only chess move allowed) journeys through Prime land, he makes a pit stop at every ...
3
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1answer
115 views

A Lollipop with Roots

$Given$: $S$, $T$, $U$, $V$. are distinct digits which can vary from zero to nine, with $V>U$. $ST$, $STT$ are concatenated Numbers. Deduce S, T, U, V from the following relationship. $$ST=\...
4
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1answer
89 views

An Arithmetic loving Ant crawls to one Hundred

This ant can do arithmetic but can crawl only horizontally or vertically, never diagonally. It starts from one of the cells shown in the picture below. It’s path covers thirteen different numbers ...
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1answer
137 views

SOLV for Narcissistic UVC

This puzzle highlights some cyclic power Relations. Please provide detailed reasoning of derivation of digits from various power relations given below: $Given$: $A$, $C$, $L$, $N$, $O$, $S$, $U$, $...
2
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2answers
81 views

All the Signs point to the Second Prime…Figure out the Missing Digits

$Given$ The six Interrelated Equations A, B, C, D, E, F All equal to 3. Allowed Digits.. 1 to 9. All the missing 9 are distinct...9?s...9 Different Digits Fillin all the digits that satisfy all ...
6
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1answer
124 views

All Raised to the Power of U

$Given$: C, I, L, U, V are all distinct digits and can vary from 0 to 9. $LIV$, $UVC$ are concatenated Numbers. $U^U$ + $V^U$ + $C^U$ = $UVC$ $L^U$ + $I^U$ + $V^U$ = $LIV$ Solve for all the ...
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2answers
106 views

Math to Math Nerdy Love Expressions…Fillin the Blanks [closed]

1) My Love for you is like $L= m.C^2$...because it grows xxx with speed of xxxx. 2) My Love is like a xxxx it goes on xxxxx. 3) You must be the xxxxx xxxx of xxxxx because I feel irrational ...
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1answer
127 views

Rhyme with Time

Commonly used units of Time are: $Second$ $Minute$ $Hour$ $Day$ $Week$ $Month$ $Year$ $Decade$ $Century$ $Millenium$ Can you find at least one rhyming word in English Language for each of ...
4
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1answer
170 views

Fill.in the two missing terms in this Simple Sequence

What are the two missing numbers in the sequence shown below: $$\def\S{\phantom{XX}} \large\begin{array}{|c|c|c|c|c|c|}\hline \S&\S&\S&\S&\S&\S\\[-10px] 4 & 5 & 6 & 7 &...
3
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2answers
660 views

Pan Digital Lucky Seven wants you to figure out all the digits

$Given$: A, B, C, D, P, Q, R, S, T are distinct digits varying from 1 to 9. AB, CD, PQ, RST are all concatenated Numbers. From the given expression , figure out all the digits to make lucky seven. ...
7
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1answer
199 views

Stars of the Celestial Bagua

Check this out: Okay, it might be more impressive if I show you what is moving along the arrows: At every vertex in a long word. Flowing in to every vertex are two short words ("inputs"). ...

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