Questions tagged [calculation-puzzle]
A puzzle that involves numerical calculations, such as multiplication and addition.
681
questions
0
votes
1answer
79 views
Train Time - Start the clock! [on hold]
The train leaves May Station right on time again. The train conductor leaves
from the driver’s cab and walks the length of the train checking tickets. It
takes him half an hour to walk it, at an ...
-2
votes
1answer
130 views
Missing Number Picture Puzzle
This is is logical reasoning puzzle in which your challenge is to find the relationship among the given numbers and then find the value of the missing number.
Source: https://www.funwithpuzzles.com/...
6
votes
0answers
385 views
Locked Door Number Puzzle
I'm supposed to make a delivery to a crazed botanist. In case you're curious, the shipping manifest is:
...
4
votes
1answer
2k views
I want an exact value of Pi
Use 1, 2, 2, 2 (Each number used exactly once) to form π.
I want an exact value of π, not any approximation.
Available operators:
+ - * / ( ) ^ !
You can use any one of them for any times.
Hint:...
7
votes
4answers
543 views
How to make the number 49?
You've to start with $1$ and can use each of the following operations at most once.
You can do the following in any order you like:
1) Add $2$.
2) Add $3$.
3) Add $5$.
4) Multiply $2.$
5) ...
-1
votes
2answers
181 views
Is there any pattern involved in the following sequence? [closed]
Consider the numerical sequence $$800,1600,4800,6400,12000,6400, \cdots.$$ Is there any pattern involved in this sequence? I am very curious to know that.
This puzzle is from a FlipKart Daily Quiz.
...
1
vote
2answers
88 views
How to fill up the numbers in a set of empty discs drawing a pentagon?
The following pentagon is composed by $10$ discs. Each disc must be filled with one number. The allowed numbers to be used are the first $10$ even positive numbers. The sum of the numbers to be placed ...
4
votes
1answer
122 views
“Short” And Sweet Math
In the following chess diagram, how many possible chess postions exist?
No looking at the solution!
Source: P1359129 & Andrew Jonathan Mestel,
Retros mailing list, 2/1/2019
1
vote
1answer
90 views
One-digit products in a row of numbers, base-N
Generalizing One-digit products in a row of numbers to base-N:
For which bases N does there exist at least one solution to the following:
"The digits from 1 to N can be arranged in a row, such that ...
12
votes
2answers
735 views
One-digit products in a row of numbers
The digits from 1 to 9 can be arranged in a row, such that any two
neighbouring digits in this row is the product of two one-digit numbers.
Arrangement:
Is it possible to do such an arrangement ...
1
vote
2answers
179 views
Find the hidden message in this weird array
This puzzle is from my best friend.
? ? 0
? ?
? ? ?
1 3 0
1 8 2 0
Figure out the answer.
Do not ignore any of the tags!
Hint:
1
vote
1answer
78 views
Missing number in a 5x5 table
I'm trying to find a solution for the following puzzle. A friend sent it to me and I know that he didn't create it and that's about it for the original source; I tried to find it on the net but I ...
2
votes
1answer
138 views
How do I answer this?
So, I'm trying to figure out this weird code that was sent from one of my friends. Could someone please tell me the sentence within?
30 30 31 31 30 30 30 30 20 30 30 31 31 30 31 30 31 20 30 30 31 31 ...
1
vote
1answer
120 views
A boy who has red hairs [duplicate]
Two math teachers were having a chat:
Do you have children?
Yes, I have 3 sons.
What are their ages?
Let's make this more fun. If you multiply the ages of my sons, you get the number 36.
Ok.
And the ...
0
votes
1answer
268 views
Magic Race between Rabbit and Turtle - who will win?
The race is for 500km and these are the following items they can use in the magic race... Every defect will activate again after completing the mentioned time.
Rabbit has the following items ...
3
votes
1answer
224 views
Missing Number in a Seven Segment Circle
What number should replace the question mark?
Please be helpful. If you have the answer, please reply to this post with the explanation and answer. If you don't have the answer, then don't comment. ...
-2
votes
2answers
181 views
I need a solution for this puzzle [closed]
This is meant to be a simple puzzle
Given that:
3 - 4= -1
5 + 3= 7
2 + 6= 15
30 / 6= 20
Find: 20% of the sum for the final answer
Hint:
Final Answer Format: 00/0=0
(/ = ÷) (Divide Symbol)
10
votes
0answers
315 views
Cloudy with a chance of meatballs
I discovered that I can control the local weather, depending on what color shirt and hat I wear at a given location. My home country of Flanmanistan has hired me to go back and do drought and famine ...
2
votes
1answer
231 views
How to solve the input output puzzle?
Here's the puzzle
I am solving daily input-output challenge questions in the gradeup android app in order to take preparation for SBI (State Bank of India) PO (Probationary officer). Here I came ...
12
votes
2answers
412 views
Somebody hacked my calculator
Harvey the hacker struck again. After powering on my calculator, I entered the Keystrokes in the order shown below. Instead of the Expected Result, I got the Hacked Result.
What will be the last ...
2
votes
1answer
196 views
Four coins on my desk
I have four coins, all of which are United States currency, on my desk. Some of these coins are face up, and the rest are face down. I know the following facts about the four coins:
1) Each of the ...
3
votes
1answer
194 views
Next term of the series
Find the next term of the series $79,95,25,39,99,$____
$(1)$ $117$
$(2)$ $81$
$(3)$ $243$
Source: IBPS PO mains exam in India
2
votes
1answer
135 views
Oops! Mixed up Multiplication - Needs to be Fixed
$Given$:
$U$, $V$, $C$ are distinct digits, varying from 1 to 9.
$U$ > $V$ > $C$
$UVC$, $VCU$, $CUV$ are concatenated Numbers
$(UVC)*(VCU)*(CUV)$ = $234235286$
The digits on the right hand side ...
11
votes
6answers
2k views
Some interesting calculation puzzle that I made
So I'm creating some kind math puzzle that goes like this:
1=-2+3
12=3*4
123=(4*5)+(6+7)*8-9+10 (thanks JS1 for finding shorter one)
1234=(5*6*7*8)-(9+10+11+12+13+14+15+16+(17*18)+19+20+(-21+22))
...
2
votes
1answer
402 views
What's the missing number?
$\begin{array}{ccc}6&7&4\\
4&11&14\\
13&2&11\\
6&8&1\\
15&3&?\end{array}$
Own attempt at building a puzzle,
find the missing number.
1
vote
1answer
91 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 ...
5
votes
3answers
281 views
Find the missing Number?
This is Tricky Puzzle That Will Totally Blow Your Brain.
Source with answer:
Note:
if you answer, do it with an explanation.
1
vote
1answer
75 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.
10
votes
2answers
1k views
sorting 4 numbers using Min - Max boxes
Min-Max is a box that is capable of determining which of the two numbers is the higher (Max) and which is lower (Min).
I need to use minimum amount of boxes in order to sort 4 different numbers (any ...
2
votes
1answer
104 views
Resolve these Highly Narcissistic Relations
$U$, $V$, $C$ , $D$ , $E$, $F$, $G$, $H$, are distinct digits, varying from 1 to 9.
$UVCD$, $EFGHD$, $EHHEV$ are concatenated numbers.
Please deduce these with concise reasoning from the given ...
3
votes
1answer
101 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.
11
votes
1answer
521 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 ...
5
votes
1answer
121 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
votes
2answers
361 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 ...
4
votes
1answer
57 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.
-3
votes
2answers
139 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....
1
vote
3answers
221 views
Jack and Jill went up the Hill to play
A Simple Card Game.
This deck of cards has only four cards simply labeled 1, 2, 3, 4. They are placed face down.
Jack and Jill take turns to draw a card. You sum up the numbers drawn so far after ...
-5
votes
1answer
94 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, ...
2
votes
2answers
145 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 ...
9
votes
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:
$COCA + COLA = SODA$
9
votes
1answer
208 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 ...
6
votes
2answers
174 views
Take Twelve to Total Twenty Two
Without repeating the numbers 1 to 12,
Fill the grid below to total 22 in both directions.
$$\def\X{\smash{\rlap{\Space{7pt}{0px}{0px}\llap{\Huge{\times}}}}}
\Large\begin{array}{|c|c|c|c|}\hline
&...
3
votes
1answer
109 views
A Lollipop with Roots
$Given$:
$S$, $T$, $U$, $V$. are distinct digits which can vary from zero to nine, with $V>U$.
$ST$, $STT$ are concatenated Numbers.
Deduce S, T, U, V from the following relationship.
$$ST=\...
4
votes
1answer
87 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 ...
-9
votes
2answers
133 views
Time detective duty [closed]
Consider that you have a beautiful wife (husband). But your after-marriage life is not so beautiful. Your wife (husband) has performed a first adultery act 5 years after a marriage with you and later ...
0
votes
0answers
69 views
Distinct SemiPrimes with Close Factors
I'm in the midst of developing a game for several friends as a friendly competition.
It begins with generating the largest distinct semiprime feasible with factors that closely related in length ...
5
votes
1answer
130 views
Any Volunteers for Card Counting?
You are given 2 matching card decks with Aces, Kings, Queens, Jacks removed. Now each deck has 36 cards.
One deck is shuffled and placed on top of the other deck. Starting from the top card, you ...
5
votes
3answers
201 views
Find the Missing Members of this Powered Sequence
There are 4 missing members in this small series...labeled ???.
Hint 1;
Hint 2:
Complete the series.
$191$, $426$, $931$, $???$, $???$, $646$, $971$, $???$, $???$
11
votes
4answers
4k views
Use 1 9 6 2 in this order to make 75
I'm looking for a solution to make number $75$ with numbers $1$ $9$ $6$ $2$ in that order and the same rules as in Use 2 0 1 and 8 to make 67.
Here a copy of those rules:
You must use all 4 digits.
...
0
votes
1answer
130 views
Don’t let this daunting equation dissuade you to deduce the desired result
Given:
A, B, P are distinct digits.
AA, AAA, ABB are concatenated numbers.
Relations:
$$P=A+A+B$$
$$(AA + ABB)^P-(ABB)^P=(AAA - A) ^P+(B+B^B*B)^P+(B^B)^P$$
Don’t be afraid to make reasonable ...
