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Programming Enigma Puzzles

14 September 2018

Posted by on **From New Scientist #1616, 9th June 1988** [link]

In the following division sum, some of the digits are missing, and some are replaced by letters. The same letter stands for the same digit whenever it appears, and different letters stand for different digits.

Find the correct sum.

[enigma465]

12 September 2018

Posted by on ** From New Scientist #1091, 23rd February 1978** [link]

“A detective is what I am, my dear Sergeant Simple”, as Professor Knowall has so often said to me.

“And detection is what I am interested in, even though the facts and objects to which you call my attention may appear to be only trivial and unimportant pawns in the game of life”.

When the mystery of the washing machine, therefore, was brought to my notice it seemed reasonable to take the professor at his word and put the facts before him.

This machine, I’m afraid, was not the washing machine it had been. Errors, inefficiencies and failure to wash had somehow crept in. I did not feel, however, that I could reveal the terrible things that this machine had been doing and I therefore decided that a screen of anonymity was required.

And so neatly anonymous did I make it that the results looked like this:

1.

D,Eis followed byq,r;

2.B,C,Eis followed byq,s,t;

3.A,C,Dis followed byp,t.I showed this proudly to the professor, but I am afraid that his reaction was disappointing.

“Can’t you ever get things right, Sergeant?”, he said.

It is a humble Simple who has to confess to his public that the professor was once more quite right. There was one mistake in the causes, i.e., in the capital letters, so that to get it right one either has to cross one out or add another one (say,

F).On the assumption that each of the faults are caused by single events and not by two or more in conjunction or separately, what can you say about Sergeant Simple’s mistake and about the causes of the various defects?

[puzzle40]

22 August 2018

Posted by on ** From New Scientist #1092, 2nd March 1978** [link]

In the following division sum each letter stands for a different digit.

Rewrite the sum with the letters replaced by digits.

[puzzle41]

17 August 2018

Posted by on **From New Scientist #1612, 12th May 1988** [link]

Below is an addition sum with letters substituted for digits. The same letter stands for the same digit whenever it appears, and different letters stand for different digits:

Write the sum out with numbers substituted for letters.

[enigma461]

8 August 2018

Posted by on ** From New Scientist #1093, 9th March 1978** [link]

Four football teams are to play each other once. After some of the matches had been played a table was drawn up giving some details of the matches played, won, lost, etc. But unfortunately Uncle Bungle had been at it again and the digits (from 0 to 9) had been replaced by letters. Each letter stood for the same digit wherever it appears and different letters stood for different digits.

The table looked like this:

(Two points are given for a win, and one point to each side in a drawn match).

Find the score in each match.

[puzzle42]

1 August 2018

Posted by on ** From New Scientist #1094, 16th March 1978** [link]

Below is an addition sum with letters substituted for digits. The same letter stands for the same digit wherever it appears, and different letters stand for different digits:

Write the sum out with numbers substituted for digits.

[puzzle43]

20 July 2018

Posted by on **From New Scientist #1608, 14th April 1988** [link]

In the following division sum, letters are substituted for digits. The same letter stands for the same digit wherever it appears, and different letters stand for different digits.

Rewrite the sum with letters replaced by digits.

This puzzle brings the total number of *Enigma* puzzles on the site to 1192, which means there are now more than 2/3 of all *Enigma* puzzles published in *New Scientist* on the site. There is a full archive of puzzles from October 1999 to the final *Enigma* puzzle in December 2013 (728 puzzles), and also a full archive from the first *Enigma* puzzle in February 1979 up to this puzzle from April 1988 (462 puzzles — there were sometimes multiple puzzles at Christmas). This leaves around 600 puzzles to be posted. Thanks to the ongoing efforts of Hugh Casement I have been able to acquire the text for most of these remaining puzzles (I have 134 left to source), so I can continue to keep posting them. There are also 48 puzzles on the site from the *Puzzle* sequence (with 43 left to go), and 51 puzzles from the *Tantalizer* sequence (I think I will be able to source around 268 more of these). Happy Puzzling!

[enigma457]

18 July 2018

Posted by on ** From New Scientist #1095, 23rd March 1978** [link]

At the time with which this story deals Alf, Bert, Charlie, Duggie and Ernie were living in separate houses in Men-only Mews.

It is useful for the managing director to know the address of his staff, but I’m afraid this information was not very easy to obtain.

However, I did manage to get some of them to tell me something:

Duggie said that the number of his house was three times the number of Bert’s.

Alf said that his number was odd, and was 23 more than Ernie’s.

Bert said that his number was nine less than Alf’s.

And Charlie said that his number was halfway between Bert’s and Duggie’s.

Men-only Mews has houses numbered from 1-50.

Find the numbers of all their houses.

[puzzle44]

4 July 2018

Posted by on ** From New Scientist #1096, 30th March 1978** [link]

The new method of rewarding goals scored in football matches goes from strength to strength. In this method 10 points are given for a win, 5 points for a draw and 1 point for each goal scored. One can get some idea of the success of the method from the fact that in the latest competition between teams, when some of the matches had been played each team has scored at least one goal in every match.

The points were as follows:

A 11

B 8

C 12

D 5

E 42Not more than nine goals were scored in any match.

What was the score in each match?

[puzzle45]

15 June 2018

Posted by on **From New Scientist #1603, 10th March 1988** [link]

Below is an addition sum with letters substituted for digits. The same latter stands for the same digit wherever it appears, and different letters stand for different digits.

Write the sum out with numbers substituted for letters.

[enigma452]

13 June 2018

Posted by on ** From New Scientist #1097, 6th April 1978** [link]

In the division sum below letters stand for different digits. But unfortunately I did not have my specs with me when I copied it out and discovered later that I had made a mistake.

letter was wrong on one of the occasions when it appeared.OneFind the incorrect letter, and rewrite the sum with the letters replaced by digits.

[puzzle46]

30 May 2018

Posted by on **From New Scientist #1099, 20th April 1978** [link]

We live, we three, on the Imperfect Isle,

Where all is not just what it ought to be.

One is a Wotta-Woppa and he never

Tells what is true, in fact a liar he.And then there is another one who cannot

Make up his mind. Oh, shall I tell a lie?

He is a Shilli-Shalla, and makes statements,

One true, one false. But which? The constant cry.

The third one is a Pukka and we find

Nothing but truth comes from the third man’s mind.Single figures all our dwellings,

And each one is different.

Three statements each, so read with care

And use your loaf to find what’s meant.

A:(1) First let me say no Shilli-Shalla I,

But I’m afraid I cannot tell you why!

(2) Then I point out that where numbers are concerned

The lower the truer; that’s the fact for which you yearned.

(3) Thirdly, no tricks,

My number’s less than six.

B:(1) and (2) A Pukka, I, and live at number one.

That’s two statements in a single line.

(3) Perfect, you might say, but not as perfect asC‘s square.

C:(1)

AandBlive on either side of me.

(2) Who is the Wotta-Woppa? Why it’sB.

(3) And now our verse

Has done its worst.

Just to finish with a wink,

To get this right you’ll have to think.

And with a nod,

A‘s number is not odd.Where do

A,BandClive and what are their tribes?

[puzzle48]

18 May 2018

Posted by on **From New Scientist #1599, 11th February 1988** [link]

In the following division sum, some of the digits are missing, and some are replaced by letters. The same letter stands for the same digit wherever it appears.

Find the correct sum.

[enigma448]

16 May 2018

Posted by on **From New Scientist #1098, 13th April 1978** [link]

In the following addition all the digits are wrong. But the same wrong digit stands for the same correct digit wherever it appears, and the same correct digit [is] always represented by the same wrong digit.

Find the correct addition sum.

[puzzle47]

2 May 2018

Posted by on **From New Scientist #1100, 27th April 1978** [link]

In the following long division sum, some of the letters are missing and some of them are replaced by letters. The same letter stands for the same digit whenever it appears and different letters stand for different digits:

Write out the complete division sum.

[puzzle49]

20 April 2018

Posted by on **From New Scientist #1595, 14th January 1988** [link]

Below is an addition sum with letters substituted for digits. The same letter stands for the same digit wherever it appears, and different letters stand for different digits.

Write the sum out with numbers substituted for letters.

[enigma444]

18 April 2018

Posted by on **From New Scientist #1101, 4th May 1978** [link]

In the following football table and addition sum, letters have been substituted for digits (from 0 to 9). The same letter stands for the same digit whenever it appears and different letters stand for different digits. The 3 teams are eventually going to play each other once — or perhaps they have already done so.

(Two points are given for a win and one point to each side in a drawn match).

Find the score in the football matches and write the addition sum out with numbers substituted for letters.

[puzzle50]

4 April 2018

Posted by on **From New Scientist #1102, 11th May 1978** [link]

In the multiplication sum below digits have been replaced by letters. The same letter stands for the same digit wherever it appears, and different letters stand for different digits.

You are told that A is not greater than 5.

Find the digits for which the letters stand.

[puzzle51]

21 March 2018

Posted by on **From New Scientist #1103, 18th May 1978** [link]

There has been a great craze for football recently on the Island of Imperfection and I have been fortunate enough to get some details of games played there.

There are three tribes on the Island — the Pukkas, who always tell the truth; the Wotta-Woppas, who never tell the truth; and the Shilli-Shallas, who make statements which are alternately true and false, or false and true.

Three teams, one from each tribe, have been having a competition, in which eventually they will play each other [once] — or perhaps they have already done this. The secretaries of the three teams have been asked to give details of the number of matches played, won, lost and drawn and they do this in accordance with the rules of their tribe — so that, for example, all the figures given by the secretary of the Wotta-Woppa team will be wrong.

The figures given are as follows (calling the teams

A,BandCin no particular order):(In no instance did a team win by a majority of more than three goals).

Find the tribe to which each of the three teams belong, and the score in each match.

[puzzle52]

16 March 2018

Posted by on **From New Scientist #1590, 10th December 1987** [link]

In the following division sum most of the digits are missing, but some are replaced by letters. The same letter stands for the same digit wherever it appears:

Find the correct sum.

[enigma440]

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