Questions tagged [calculation-puzzle]
A puzzle that involves numerical calculations, such as multiplication and addition.
677
questions
-1
votes
2answers
162 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
77 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 ...
-3
votes
0answers
81 views
Magic number 27 using only odd numbers [closed]
How do you make a magic square with magic number 27 using only odd numbers?
\begin{array} {|c|c|c|}
\hline
-&-&-\\
\hline
-&9&-\\
\hline
-&-&-\\
\hline
\end{array}
$1,3,5,7,...
4
votes
1answer
116 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
88 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
730 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
171 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
69 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
137 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
118 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
264 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
213 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
180 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)
9
votes
0answers
302 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
212 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
409 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
188 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
192 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
134 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
398 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
90 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
279 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
520 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
359 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
56 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
216 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
93 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
173 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
86 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
68 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
129 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
129 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 ...
12
votes
2answers
247 views
I Want Some Ice Cream
This is similar to the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles. Giving credit where credit is due.
I was sitting at Landra Hort's Mystery Ice ...
0
votes
1answer
212 views
Number Sequence Series-Question 8
This is a series of questions that are created by me.
Here is question 8:
(36),(45),?,(17),(50),?,(29)
I will give a hint to you guys if I feel it is necessary.
$$$$
You can check other unsolved ...
3
votes
0answers
611 views
Number Sequence Series-Question 7
This is a series of questions that are created by me.
Here is question 7:
(23)，(55)，(155)，(1255)，？，？，(56139611)
I will give a hint to you guys in one month if nobody can solve it.
5
votes
0answers
181 views
Numerical puzzle
A friend of mine sent me this puzzle, to solve it you need to use:
1) basic arithmetic operations.
2) Multiple numeral systems.
