Questions tagged [calculation-puzzle]

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

8 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
5
votes
0answers
469 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: ...
5
votes
0answers
207 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.
4
votes
0answers
169 views

Open the third door!

I was wandering in an abandoned house. When I went down to the basement I found three doors. All three doors have a triangle painted on them, two of them with a number outside the triangle, these ...
4
votes
0answers
706 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.
3
votes
0answers
204 views

3 x 3 Grid Square Problem

For a question that I need to answer, we have to show that there is only one arrangement for which, in a 3 x 3 grid in which the numbers from 1 to 9 are placed and 5 is the centre number, the sum of ...
1
vote
0answers
121 views

Find the missing number in the series

Numbers in the series: 4,12,14,16, ?, 25 Please help me find the missing number in the series above. I have already tried with different sequences but unable to solve this. Thanks.
0
votes
0answers
167 views

Reverse Engineering Computer Formula

A computer uses an unknown formula to create a 4 digit Output using specific Input. Here are 3 examples: Input = 20066 : 020470 : 47 : 1 : 322267 Output = 0927 Input = 20066 : 020470 : 46 : ...
0
votes
0answers
76 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 ...