Questions tagged [calculation-puzzle]

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

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6
votes
2answers
363 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
58 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
140 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
235 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
95 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
147 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
210 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
175 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
111 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
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 ...
-10
votes
2answers
141 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
75 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
136 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
202 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 ...
12
votes
2answers
248 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
232 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 ...
4
votes
0answers
694 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
199 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.
1
vote
2answers
99 views

Math quiz from a book [closed]

A student took some exams. The arithmetical average of his grades is 25. He takes another exam today and he gets a 30, so the arithmetical average of his grades becomes 26. How many exams did he take, ...
5
votes
1answer
139 views

Number Sequence Series-Question 6

This a series of questions that are created by myself. Since question 6 is not that difficult I will not give any hint to you guys. Enjoy the test. Here is question 6: 2,6,8,7,5,3,? $$$$ If you ...
3
votes
1answer
114 views

Number Sequence Series-Question 5

This a series of questions that are created by myself. I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question. Here is question 5: 342,765,?,242325 (It ...
2
votes
3answers
110 views

Number Sequence Series-Question 4

I want to share a series of questions that are created by myself. I will give a hint in 24 hours and my answer in 3 days if nobody could answer my question. Previous ones are here: Number Sequence ...
2
votes
1answer
163 views

Number Sequence Series-Question 3

I want to share a series of questions that are created by myself. I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question. Here is my number sequence: 2020,...
3
votes
2answers
156 views

Can you express this orderly Palindromic Devil in strict ascending Pandigital form?

Given: Devil as you know is $ 666 $ Using digits 1 to 9 in strict ascending order and only three mathematical signs ( +, -, /, x ... of these are allowed), write the Pandigital expression $ 666 = ...
1
vote
1answer
176 views

Be a Wizard..Find the missing digits of this 41 digit Humongous Palindromic Square!

Absolutely No calculators or computers. Only Simplest Method for finding the missing digits will be accepted as the right answer. Given: The square of this 21 digit number $ 229 359 782 235 085 ...
4
votes
1answer
300 views

Number Sequence Series-Question 2

I want to share a question that is created by myself. I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question. Here is my number sequence: 1441,2882,5764,?,...
4
votes
3answers
338 views

Number Sequence Series – Question 1

I want to share a question that is created by myself. I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question. Here is my number sequence: $3/2, 2/3, 3/4, ...
5
votes
1answer
325 views

Find the next term

Here, we have a sequence. 0 , 15 , 23 , 155 , 287 , 539 , 767 , ? Can you find the next element ? HINT 1 HINT 2 HINT 3
0
votes
1answer
132 views

How much did he pay for the car? [closed]

A man withdrew half the money that was in his bank account to buy a second-hand car, then sold the car two weeks later, receiving only three-quarters of the price he had paid for it. When he paid the ...
5
votes
3answers
339 views

How to solve this number-sequence?

My friend gave me this fun puzzle to solve but I still cannot figure out the logic between them... 1,3,4,7,8,11,14,15,19,22,23,25,26,?,?,?,? Could anyone help me solve it?
17
votes
3answers
2k views

France's Public Holidays' Puzzle

In France, there are 11 public holidays. As a French employee who enjoys public holidays on week days, you want to know if it is possible that all of the 11 public holidays during one year fall on ...
5
votes
2answers
172 views

Two, completely independent, means exist to obtain the same answer

... one "local"; and one "global" 1) 1 + 1 = 2 2) 2 + 1 = 4 3) 3 + 2 = 9 4) 5 + 3 = 17 5) 7 + ?? = 32 Can you determine the correct answer ...
0
votes
1answer
107 views

Max pieces to cover a chess board [closed]

Number of individual chess pieces to cover all chess board
1
vote
1answer
208 views

Extremely Long Difficult Number Sequence

(2 7 4 4 5 7), (?), (2 1 3 2 1 7 1 4 1 5), (2 2 4 1 1 3 1 7 1 4 1 5), I can't find any links between these numbers, anyone could help me solve it?
1
vote
2answers
340 views

The result is 7 game

The goal of this game is to find the lowest score for the 10 equations below. 0 ? 0 ? 0 ?...
0
votes
0answers
100 views

Can you Solve it [duplicate]

----- + ----- + -----= 30 Use only (1,3,5,7,9,11,13,15)
14
votes
2answers
422 views

Construct $\sqrt{3}$ using every natural number

Construct $\sqrt{3}$ using every natural number $n\in \mathbb{N}$ (1, 2, 3, 4...) exactly once and the operations addition ($+$) and division ($\div$).
8
votes
1answer
281 views

A Number Game puzzle

Our team has created 9 math puzzles with ranging difficulty. Let me share one of them. At the beginning a number is given to you. Your objective is to get a different number by making choices. Here's ...
7
votes
3answers
406 views

Writing differences on a blackboard

The numbers 25 and 36 are written on a blackboard. At each turn, a player writes on the blackboard the (positive) difference between two numbers already on the blackboard, if this number does not ...
3
votes
2answers
154 views

The fantastic matrix

Here's another question that I have been asked in an interview lately. Let $M$ be an $n × n$ matrix whose values are $”+”$ and $”-”$. M is called fantastic if it is possible to make all it's values $”...
1
vote
2answers
87 views

Fill two dimensional list by meeting given conditions

Suppose you have a 2D array - a list that exits in both x and y axis - which is 4 x 4, and you need to fill the table by putting numbers in it obeying following restrictions. Each cell is able ...
3
votes
1answer
263 views

Infinite dials to reset ever?

I have an infinite number of dials with red needles that rotate $n\in\mathbb{Z^+}$ times every second. They all start pointing North. Will they simultaneously all point North ever again?
4
votes
2answers
567 views

How to make 18 from 1, 3, 4, 8

This question was on my sister's 5th-grade homework, practicing order of operations. It was to make 18, using the numbers 1, 3, 4, 8 and the operations +, -, and *. The instructions imply using each ...
3
votes
1answer
338 views

Albrecht Durer Inspired Magic Square

A magic square is an n-dimensional matrix in which each row, column, and main diagonal sums to the same 'magic number' (denoted by s). A normal magic square uses each of the numbers from 1 to n ...
-2
votes
1answer
202 views

How to solve this puzzling?

20190309,245111132328,331508165892,51222189610023,? A friend of mine gave me this number puzzling but I have no idea what is the logic. Does anyone know how to solve?
4
votes
2answers
225 views

Digital Font Puzzle. One easy the other may be not

In the Digital Font shown below, each letter is made up of line segments. For example letter A has 6, B has 7, C has 4 segments and so on. Question 1 ( Easy) Which english number, when spelled out ...
6
votes
2answers
1k views

What's Bob's age again?

I created this problem myself, but I did have inspiration. Today is a special day, I'm moving out of my parent's house. My father comes to me and says "Wow, you're half my age. On the day we moved ...

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