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Hola:
Let's see how well you know how Ceasar and Pompey did their counting:

a) Indicate the corresponding values of the following:
• IXX = ___
• XIX = ___
• XXI = ___

b) How many numbers can you indicate with 3 matchsticks ? e.g.: I = 1; II = 2; III = 3,... etc.

c) What is the largest number can you indicate with:
• 3 sticks ?

• 4 sticks ?

• 5 sticks ?

d) If you have 23 sticks, no more, no less, what is the largest value can you make out of them ?
• Clue: The value consist of 7 digits in our counting system.

Do these just in the spirit of fun ! [H]M
Comments  

Hola Mark! Nueva adivinanza matemática Emotion: big smile. Espero que no me he equivocado.

a)

IXX - no existe
XIX - 19
XXI - 21

b)

Si tienen que estar en el orden: I, II, III, IV, V, VI
pero de tres cerillas se puede hacer otros números romanos: IX, X, XI, L, LI, C

Tengo curiosidad por las respuestas a la pregunta c)

Saludo

WesleySi tienen que estar en el orden: I, II, III, IV, V, VI
pero de tres cerillas se puede hacer otros números romanos: IX, X, XI, L, LI, C

Tengo curiosidad por las respuestas a la pregunta c)
Saludo
Wes:
•a) [Y]
•b) You missed one: IL = 49. Wes, if you have straight sticks, no way you can make a C out of them, right?
•c) With *3 sticks: XI = 11
*4 sticks: M = 1,000
*5 sticks: MI = 1,001
_________________________

ojo: ERRATUM (that is, an error !):
• Re: d) The value consists of 4 not 7, digits in our counting system— (sorry about that).

[H]M

De tres cerillas puedes hacer C, mira: I ¯ _ y tienes C jajaja
_
Sabes ¿qué, por ejemplo, significa una inscripción X (de tres cerillas)?

WesleyDe tres cerillas puedes hacer C, mira: I ¯ _ y tienes C jajaja
_
Sabes ¿qué, por ejemplo, significa una inscripción X (de tres cerillas)?
Wes:

If you say that 3 straight sticks can simulate the letter C to represent the roman numeral for 100, then, by logical extension, you can also say that 4 straight sticks can simulate the roman D for 500.
But then, it would look like a perfect square. So, how would you tell if it's a D o an O ?
If I were to use straight sticks to simulate the roman C for 100, I'd rather use just 2 sticks, like
so: "<" — e.g.: Sparta<us, in the same way that V is used instead of U as in SENATVS.
So, D would be something like this: "i>", using 3 straight sticks.

As to the presence of that short horizontal line ( ¯ ) over a roman numeral, simply means that the numeral is to be multiplied by 1,000, so that if you have 3 sticks, you can indicate any of these values: 9, 10, 11 or 10,000. A parenthesis ( ) can be used for the same effect — e.g.:
(X) = 10,000; (L) = 50,000, etc.
2011 is: MMXI or (II)XI.

[H]M