- #1

- 5

- 0

help me i dont know where i must to posting this task

if

8+4=12

7+2=9

2+3=6

6+5=10

9+5 = ?

if

8+4=12

7+2=9

2+3=6

6+5=10

9+5 = ?

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- Thread starter daelin
- Start date

- #1

- 5

- 0

help me i dont know where i must to posting this task

if

8+4=12

7+2=9

2+3=6

6+5=10

9+5 = ?

if

8+4=12

7+2=9

2+3=6

6+5=10

9+5 = ?

- #2

Mentallic

Homework Helper

- 3,798

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2+3=5 and 6+5=11 but you've shown otherwise, and I don't understand how we are now going to conclude what 9+5 is equal to based on this wrong maths.

- #3

- 5

- 0

2+3=5 and 6+5=11 but you've shown otherwise, and I don't understand how we are now going to conclude what 9+5 is equal to based on this wrong maths.

figured number

13+7=5

15+6=9

10+7=11

8+8=11

this for next example

please help :D

- #4

Mentallic

Homework Helper

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Right now I'm just seeing a few additions that a kid failing kindergarten tried to attempt.

- #5

- 311

- 1

Is this a riddle? Or are you asking for help on answering a question?

- #6

Mark44

Mentor

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Much of this doesn't make any sense. 2 + 3 = 5, not 6, and 6 + 5 = 11, not 10.help me i dont know where i must to posting this task

if

8+4=12

7+2=9

2+3=6

6+5=10

9+5 = ?

And none of the above makes any sense.figured number

13+7=5

15+6=9

10+7=11

8+8=11

this for next example

- #7

HallsofIvy

Science Advisor

Homework Helper

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I assume that this is some algebraic structure in which the digits do NOT refer to the usual integers and/or "+" is not ordinary "add". But the difficulty is, whathelp me i dont know where i must to posting this task

if

8+4=12

7+2=9

2+3=6

6+5=10

9+5 = ?

Assuming that it is associative, 9+ 5= (7+ 2)+ 5 but I don't see where to go form here.

- #8

gb7nash

Homework Helper

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help me i dont know where i must to posting this task

if

8+4=12

7+2=9

2+3=6

6+5=10

9+5 = ?

I'm going to throw in a wild guess and say 14.

- #9

- 2,967

- 5

help me i dont know where i must to posting this task

if

8+4=12

7+2=9

2+3=6

6+5=10

9+5 = ?

If each symbol stands for a particular, but different true decimal digit and '+' is a sign for regular addition, then the above conditions do not have a solution. I have check all 151,200 possibilities by brute force.

- #10

Mentallic

Homework Helper

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If each symbol stands for a particular, but different true decimal digit and '+' is a sign for regular addition, then the above conditions do not have a solution. I have check all 151,200 possibilities by brute force.

That's what I was thinking.

Essentially we would be solving

a+b=c

d+e=f

e+g=h

...

etc.

Without being given any further information as to how these symbols interact with each other.

But I have a totally new theory, the OP is just trolling us.

- #11

Mark44

Mentor

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That thought crossed my mind, too.But I have a totally new theory, the OP is just trolling us.

- #12

- 5

- 0

That's what I was thinking.

Essentially we would be solving

a+b=c

d+e=f

e+g=h

...

etc.

Without being given any further information as to how these symbols interact with each other.

But I have a totally new theory, the OP is just trolling us.

my teacher just say

"do not be fooled pattern placement sequence similarities.

without divisors and a deduction"

- #13

gb7nash

Homework Helper

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"do not be fooled pattern placement sequence similarities.

without divisors and a deduction"

Clarify? This makes no sense to me. I still think 14's a good answer.

- #14

- 5

- 0

there are only 2 of mathematical symbols

x nd +

x nd +

- #15

- 47

- 0

Z

- #16

- 47

- 0

If:

8+4 = 12

3+5 = 17

9+4 = 2

6+5 = 11

Then 9+5 = somebody failed kindergarten.

No offense to you or anything, because this is a very difficult logic problem; whether or not it is actually solvable I don't know. But, I'm taking the easy way out.

- #17

Mentallic

Homework Helper

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Z

Then the troll wins! :yuck:

- #18

- 52

- 0

If each symbol stands for a particular, but different true decimal digit and '+' is a sign for regular addition, then the above conditions do not have a solution. I have check all 151,200 possibilities by brute force.

That's what I was thinking.

Essentially we would be solving

a+b=c

d+e=f

e+g=h

...

etc.

I too thought the same thing. How did you come up with 151,200 possibilities btw?

- #19

- 2,967

- 5

I too thought the same thing. How did you come up with 151,200 possibilities btw?

help me i dont know where i must to posting this task

if

8+4=12

7+2=9

2+3=6

6+5=10

9+5 = ?

The following digits appear: {0, 1, 2, 3, 4, 5, 6, 7, 8 , 9}, i.e. all ten of them. Let us make the correspondence to variables:

0 <-> a

1 <-> b

2 <-> c

3 <-> d

4 <-> e

5 <-> f

6 <-> g

7 <-> h

8 <-> i

9 <-> j

Then, the above condition may be rewritten as:

i + e = 10*b + c

h + c = j

c + d = g

g + f = 10*b + a

However, we have 4 linear relationship between the 10 of them. So, we may choose 6 of them as known and express the other 4 in terms of them. Since we have to find the result of the operation '9 + 5 <-> j + f', I consider f and j among the 4 'unknowns''. The 'known' variables are:

(a, b, c, d, e, h)

Then, the 'unknowns' (f, g, i, j) are expressed as:

f = a + 10*b - c - d

g = c + d

i = 10*b + c - e

j = c + h

We choose the 'knowns' from the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}. The order matters. Also, we cannot choose the same value for different symbols. Thus, the number of choices is equal to the number of selections without repetition of 10 elements of class 6:

10*9*8*7*6*5 = 151,200

I made a program (in Mathematica) to go through all possibilities. For each selection, it calculates the knowns. Then, it checks these things:

- Whether each 'unknown' is between 0 and 9, inclusively
- Whether each 'unknown' is different from ANY of the 'knowns'
- Whether each 'known' is different from ALL of the other 'unknowns'

Effectively, this checks whether I had generated a permutation of the ten decimal digits. Any such permutation is a viable option. However, the program did not find a single such selection.

- #20

- 52

- 0

hmm. I assumed the final question would have the answer in the symbol set and the numbers may be just symbols i.e. two numbers are the same just different symbols. Thanks for the explanation.

Last edited:

- #21

- 5

- 0

please make is logic

how can 8 + 8 it should 16 but this is 11

10 + 7 should 17 but 11

how can 8 + 8 it should 16 but this is 11

10 + 7 should 17 but 11

- #22

Mentallic

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- #23

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- 0

I think it's some kind of series brain teaser where the numbers follow some pattern, but I have no clue what.

Like for example 2 + 3 = 10 where + means to add the numbers and multiply by the first.

I have no clue what the pattern in the poster's example are though. But maybe someone else can think of an operation that + and = could stand for?

... maybe looking at them this way makes it easier to find a pattern:

8,4,12

7,2,9

2,3,6

6,5,10

Like for example 2 + 3 = 10 where + means to add the numbers and multiply by the first.

I have no clue what the pattern in the poster's example are though. But maybe someone else can think of an operation that + and = could stand for?

... maybe looking at them this way makes it easier to find a pattern:

8,4,12

7,2,9

2,3,6

6,5,10

Last edited:

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