Questions tagged [missing-digits]

A puzzle involving a calculation from which some digits have been removed. Different from an [alphametic] in that it is not specified which digits are the same or different from each other.

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18
votes
2answers
2k views

Someone has vandalised this long division. Can you reconstruct it?

Oh dear, someone has vandalised this long division. They've replaced every digit either with a wrong digit or a hyphen. Your task: reconstruct the entire thing. There's no remainder. Please show ...
14
votes
2answers
834 views

What are the missing numbers?

The question is to find the value(s) of *. All the values may be same or different. for example- one of the * could be 8 while another one could be 4. P.S. While cleaning my old cupboard, I came ...
12
votes
1answer
1k views

Can't solve a find the missing number question

I found the following question on the TORN forums, and haven't been able to solve it. $$\begin{matrix}2&9&4&4\\6&0&3&0\\1&3&0&1\\0&5&7&3\\x&8&...
12
votes
3answers
831 views

Reconstructing long division problems

How do I reconstruct the following exact long division in which the digits that have been replaced by letters except for the middle digit - the '8' - in the quotient. I've never seen one of these ...
6
votes
1answer
446 views

Find the next number [closed]

"I will, of course, kill you if you don't answer. But that's a given, isn't it?" The Enemy says. "So come, Zero, and show me your legendary brain." $2.828,\quad5.196,\quad11.180,\quad18.520,\quad x$ ...
5
votes
3answers
981 views

How many digits can be removed from a multiplication puzzle and still give only one answer?

There's a common category of mathematical puzzle which involves determining missing numbers in a long multiplication problem. As an example from this site (problem 10): ...
5
votes
2answers
1k views

How many digits can be removed from a division puzzle?

Similarly to How many digits can be removed from a multiplication puzzle and still give only one answer? I am curious about division puzzles. I know this puzzle: . It has only 2 out of 42 digits $\...
5
votes
1answer
285 views

PUZZLE WORLD alphametic

I have tried to solve this but I can't. Does somebody know the answer? Ref: Puzzle World, Ed. Nob Yoshigahara and Richard Bozulich, Ishi Press, Summer 1992, Pilot Edition.
5
votes
1answer
344 views

Oh go dear! again… we Here

What is the missing one? $\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, $ [Some colours look alike, sorry about that, but then again you don't really need to be able to make a visual difference between them, ...
4
votes
1answer
689 views

Number circle with gaps

Does anyone know what this is and how to solve it? Thank you.
4
votes
0answers
733 views

A 4x4 grid puzzle with one missing number [closed]

I can't find any logical relationship in this grid! Could someone help me, please? and choices are A. 8 B. 6 C. 5 D. 4 This book is the source of the puzzle. The translation of its title is ...
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. ...
3
votes
1answer
218 views

1-2-3 Ending Puzzle

$ED \quad \ \ \ EN \quad \ \ UE$ $451\ \ \ \quad 662\ \ \quad8w3$ $1601\quad2062\quad16x3$ $2551\quad2282\quad16y3$ $2551\quad1112\quad10z3$ There's only one possible value apiece for $w, x, y$ ...
3
votes
2answers
377 views

Find the missing digits [closed]

How to solve these missing number questions, and what logic should be applied to solve these type of questions?
1
vote
2answers
169 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
217 views

Missing number in 5-cell grids

Find the missing number in these grids. I was unable to find any pattern. Choices: 9 6 8 4 source: Borhan Motevasete magazine, Oct. 2007
1
vote
1answer
194 views

Find the missing number in the matrix [closed]

Find the missing number, $x$, in the following matrix $$\begin{matrix} 16 & 13 & 9\\ 11 & 8 & 6\\ 9 & 7 & x \end{matrix}$$
0
votes
2answers
354 views

Find the missing digit in the sequence 0110100011111?0011000011011 [closed]

What digit would you put in place of question mark in the below sequence and why? 0110100011111?0011000011011 P.S. Hint: 0=1, 1=0,...