A crazy sequence, number or not

Logic Level 3

Consider those 7 terms written in the text to be a sequence (although they are choices).

Fortunately the next term looks like a number.

You have to find what is that number in the sequence?


The answer is 88.

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1 solution

The 7 terms in this sequence are 11, 22, 33, 44, 55 ,66, 77. Really what is happening is that the last digit in this sequence is reversed, ie, imagine a vertical line in the middle of each of these terms in the sequence, then the last digit is seen as symmetrical to the first with respect to this axis vertical... Consequently the next term in this sequence is 88,which is symmetrical about this axis, so effectively this number will appear(look like) in the sequence as a number.

Note.- This sequence appears in a film: In Spanish it's "Los crímenes de Oxford" ... The Oxford Murders

This is a classic logic problem Guillermo so I wouldn't be surprised if I would find it in more than just one movie anyway.

I prefer interpreting the relation you describe by saying they are "mirror images" of the first digits taken in order as it has more direct and intuitive content though the formal description which you offer is somehow more justified even if the understanding which it renders in my opinion is lesser than the one provided by my interpretation anyway.

A A - 4 years, 9 months ago

It was my luck that mirror image of 8 is 8 so it looked 88, which is a number. So I posted this. If it were 7,6,... or anything else I would not have posted this as I couldnt interprete it as a number

Prince Loomba - 4 years, 9 months ago

Also was in Deltora Quest for any of those avid readers.

Sharky Kesa - 4 years, 9 months ago

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Sorry Prince, Sharky and A A.(This is not about this problem). @Sharky Kesa , please you have to read my fourth comment here . It's very important, because if you don't asume it your problem is only partially correct.

Guillermo Templado - 4 years, 9 months ago

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What to assume here? Yeah you are right there

Prince Loomba - 4 years, 9 months ago

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@Prince Loomba I mean here is only a link. The problem with that question is that if the other 4 no underlying points in the line passing through the 5 points were aligned the answer would be 70, and if only 3 of them were in another line the answer would be 73.

Guillermo Templado - 4 years, 9 months ago

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@Guillermo Templado Actually the mistake is 5 points lie on a straight line. So you are wrong. They lie on same line

Prince Loomba - 4 years, 9 months ago

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@Prince Loomba No, you don't understand me, I mean the other 4 points.

Guillermo Templado - 4 years, 9 months ago

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@Guillermo Templado Understood now. Yeah you are right. The others are non collinear. It is to be mentioned

Prince Loomba - 4 years, 9 months ago

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@Prince Loomba Exact, you got it

Guillermo Templado - 4 years, 9 months ago

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@Guillermo Templado Report it...

Prince Loomba - 4 years, 9 months ago

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@Prince Loomba No, Sharky just know it... She(he) hast to see what I mean

Guillermo Templado - 4 years, 9 months ago

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@Guillermo Templado He haha not she

Prince Loomba - 4 years, 9 months ago

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@Prince Loomba haha, ok. I didn't know it, haha.

Guillermo Templado - 4 years, 9 months ago

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@Guillermo Templado How can you not know I am a boy?! It says in my description!

Sharky Kesa - 4 years, 9 months ago

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@Sharky Kesa Sorry, I didn't read your description, and I am not familiar with the names of people in India, Australia and other countries.

Guillermo Templado - 4 years, 9 months ago

@Sharky Kesa Is your description : I AM A BOY?

Prince Loomba - 4 years, 9 months ago

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@Prince Loomba A boy who likes maths, chess and reading. Name on AoPS - SHARKYKESA (BTW 14 YRS OLD!).

This is what my summary/description says!

Sharky Kesa - 4 years, 9 months ago

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@Sharky Kesa I was joking

Prince Loomba - 4 years, 9 months ago

@Sharky Kesa I can write on my profile I'm superman, and actually later I can be a 6 years old girl, you'llbe a woman soon

Guillermo Templado - 4 years, 9 months ago

@Sharky Kesa Or AM I A BOY?

Prince Loomba - 4 years, 9 months ago

@Guillermo Templado He is very intelligent really..

Prince Loomba - 4 years, 9 months ago

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