Questions tagged [calculation-puzzle]

A puzzle that involves numerical calculations, such as multiplication and addition.

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0answers
89 views

6+8=71 move two matches asked previously [duplicate]

This problem I just asked a few minutes ago just adding additional pictures
1
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1answer
49 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 ...
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1answer
47 views

Is it possible to find easily the number of RNA chains after a fragmentation? [on hold]

This riddle has got me confused over several days and I'm not sure how to find the answer. The story is shown below: A molecular scissor is an enzyme which breaks down RNA chain. At a laboratory ...
2
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1answer
115 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 ...
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1answer
249 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 ...
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0answers
53 views

Triangular Gunfight [duplicate]

Good, Bad and Ugly are about to take part in a three-way gunfight. Each is positioned on one of the three points of a triangle. The rules are that Ugly will shoot first, then Bad, then Good, before ...
1
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1answer
108 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 ...
-2
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0answers
54 views

Find 1 fake coin out of 10 coins (1 fake + 9 Original) in minimum comparisons [duplicate]

I have 10 coins where 9 are Original and 1 is Fake, which means the Fake one coin is either Heavier or lighter then Original coin. so in how many minimum comparison we need to find fake coin. links ...
2
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4answers
10k views

clock values using just “9” (and some operators)

Sometimes a clock is posted on Facebook and the likes where digits are substituted by mathematical expressions. A friend of mine asked me what is the smallest numbers of "nine" which let one express ...
2
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1answer
373 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.
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1answer
189 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. ...
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2answers
175 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)
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1answer
426 views

What is the next sequence of numbers?

Seven and seven is forty-two, Eight and nine are fifty; Ten and eleven are sixty-two, And twelve and twelve are five. What is the next sequence of numbers?
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0answers
291 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
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1answer
184 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
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2answers
403 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 ...
18
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3answers
5k views

You surely don't want to score 100/100

The Story: Today, the Maths quizzes are handed out by the teacher. You got 100/100. Everyone got 100/100. But you're not happy with it. Everyone's not happy with it. You want to ...
3
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1answer
186 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
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1answer
183 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 ...
6
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2answers
699 views

Legal advise for a family dilemma

"A client of mine," said a lawyer, "was on the point of death when his wife was about to present him with a child. I drew up his will, in which he settled two-thirds of his estate upon his son (if it ...
0
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1answer
247 views

Fuzzy's Fizzy Dilemma [closed]

Fuzzy the Fuzzball's friends was going to the Fuzzball Festival, and of course he went along. While there, he saw the most curious display. The booth was displaying brand new types of Fuzz. There was ...
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2answers
373 views

Off roading in a desert [closed]

You’re off-road, in the desert, driving an all-terrain vehicle. You’re $10$ miles off the straight highway, and your destination is $100$ miles ahead, also $10$ miles off the straight highway. You can ...
8
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3answers
4k views

How to make 21?

How do you make $21$ from the numbers $1$, $5$, $6$, and $7$? You can use the operations of addition, subtraction, multiplication and division, as well as brackets. You must use each number exactly ...
11
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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)) ...
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1answer
129 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 ...
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6answers
43k views

Fill number in missing?

Given options are: A. 13 B. 42 C. 18 D. 30
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3answers
269 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.
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1answer
88 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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1answer
73 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.
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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 ...
19
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17answers
9k views

Number 88 from the digits 2, 0, 1 and 7?

Can you use the digits 2, 0, 1 and 7 each only once to create the number 88?
2
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1answer
101 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
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1answer
98 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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1answer
513 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
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1answer
120 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
358 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
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1answer
52 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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0answers
600 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.
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10answers
44k views

A camel transporting bananas

A somewhat well-known puzzle is described as such: You have a pile of 3,000 bananas. You wish to transport them to a place 1,000 miles away on the back of a camel; however, the camel can only carry ...
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2answers
134 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
206 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 ...
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2answers
130 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 ...
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1answer
89 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
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2answers
139 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 ...
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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: $COCA + COLA = SODA$
11
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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. ...
9
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1answer
205 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 ...
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2answers
171 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
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1answer
106 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
83 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 ...