Only For Geniuses

Post by **WLLady** » Sun Jun 05, 2016 8:49 pm

WHOOHOO i do math at a grade 7 level!!!!!

Robbie · Post by **Robbie** » Sun Jun 05, 2016 9:40 pm

AAAAGh too soon! I was working on this!!!
OK so how do you prove it never does?

Post by **poultry_admin** » Mon Jun 06, 2016 6:57 am

Assume a 2 digit number.
In order for it to work, the number has to be between 10 and 16.5, so start with a one (1). Any bigger will get you 3 digits when you multiply by 6.
This also means that the result number has to end on 1 (odd number). But that doesn't work either, because anything multiplied by 6 is an even number.
A number cannot be even and odd at the same time.

Maximus · Post by **Maximus** » Mon Jun 06, 2016 7:48 am

An Octopus can fit through any hole larger than its what?

Robbie · Post by **Robbie** » Mon Jun 06, 2016 8:01 am

tentacle?

Maximus · Post by **Maximus** » Mon Jun 06, 2016 8:01 am

Robbie · Post by **Robbie** » Mon Jun 06, 2016 8:14 am

poultry_admin wrote:QR_BBPOST Assume a 2 digit number.
In order for it to work, the number has to be between 10 and 16.5, so start with a one (1). Any bigger will get you 3 digits when you multiply by 6.
This also means that the result number has to end on 1 (odd number). But that doesn't work either, because anything multiplied by 6 is an even number.
A number cannot be even and odd at the same time.

Grade 8???!!!!! I'd better start brushing up, this is embarrassing.

Post by **poultry_admin** » Mon Jun 06, 2016 5:44 pm

Robbie wrote:QR_BBPOST Grade 8???!!!!! I'd better start brushing up, this is embarrassing.

Look at the year and country, too. Also, math Olympics is NASTY stuff. I thought I should have a look and read the current ones. Picked Grade 7 LOCAL level (not even regional) and went like:
Question1, I understand what they are asking, no clue.
Question 2: no clue what they are asking
Question 3: ?????? I speak the language, but that is Greek to me.
Ok, I give up.

The question was in the german news (spiegel online) as entertainment this weekend. 44% said they could solve it and it was easy.
Not sure what they are dreaming over there, but that's clearly not easy.

I got to the answer that there is no solution, but totally missed the part that I had to prove it... When I couldn't find one with 3 digits, I gave up.

Robbie · Post by **Robbie** » Mon Jun 06, 2016 5:57 pm

I'd love to see those questions 1, 2 and 3 (just for entertainment) and then perhaps you could ask another math question, maybe the grade 5 level so I could feel good about myself!!! Hee heee!!
How much time do they give for those olympics questions anyway? I was at it half the night.

Post by **poultry_admin** » Mon Jun 06, 2016 6:55 pm

Maximus, don't shoot me. Robbie asked....

(Grade 3 !) School level. This is the lowest entry level. Starts in September, so they would have just entered grade 3... The kids would be 8 when they do this. I feel better...I can do these while translating... Reference: http://www.mathematik-olympiaden.de/akt_aufgaben.html

Q1 - Socks:
In a drawer are 10 white and 10 black individual socks. Find the lowest number of socks that make for sure a same coloured pair when you fish them out at night. Explain.

Q2 - Sums of 4s:

: sumof4.GIF (9.58 KiB) Viewed 3338 times

You see the table attached. Select four numbers such that the sum equals 70.
Example: 1+4+31+34=70
Find four additional solutions.

Q3 - Number of Students:

Translation:
Mädchen : Girls
Jungen : Boys
Gesamtzahl : Sum (Combined)
Jahrgang : Number of students per year.
Klasse : Class => Class 1A and Class 1B are the two sections of that year's September intake. Combine the numbers to get to the total numbers

a) Fill in the missing numbers in the Table
b) how many children are going to this elementary school altogether (there are only the 4 years in that school)
c) How many girls are going to school there?
d) How many boys are going to school there?
e) in which class are the fewest boys?
f) for the next intake there are 49 applications for Class1 and 2 children from class 3 are moving away. How many children will be at the school next fall? (You need to know that the class 1 kids are moving to class 2 and so on. Class 4 leaves elementary school and goes to high school next fall)

Q4 Alphabet:

: aphabet.GIF (5.79 KiB) Viewed 3338 times

You see the letters of the alphabet above.
a) which of the letters is mirror symmetric on a line? Show the mirror line.
b) Which letters have more than 1 mirror line? Show the letters and the lines.
c) The letter "R" can be mirrored on a line like this:

: R.GIF (1.44 KiB) Viewed 3338 times

Show the mirror image of these letters:

: Other.GIF (2.24 KiB) Viewed 3338 times