Number Sense Study List

[Englandude]

What variations of problems on this years numbersense tests have you found?

[stupidityismygam]

well, i know there are some...but i dont know them off the top of my head...

probably what you should do is print out all of the tests of this year...put them side by side and notice the similarities, and then find how he changed the problems....

this would give you an idea of how he changes from test to test and might see some of the changes and extensions of tricks he could do... here is a good example


Find the sum of the first 12 terms of the Fibbi sequence 1,2,3,5.... answer is 608

He could change this to read....

Find the sum of the first 12 terms of the Fibbi sequence 2,4,6,10....

If you notice the second sequece is the same as 2(1),2(2),3(2),5(2)...
so the answer is 1216
(there is an example of this type of problem on UIL b)

[Englandude]

Ok. Thanks alot. I will do that tomorrow. I have all of this years numbersense tests on a flash drive, but my printer isn't working. New printer time!

[bradp]

Know these numbers:
prime
composite
perfect
abundant
deficient
happy
unhappy
lucky
unlucky
extravagant (wasteful)
economical (frugal)
equidigital
transcendental

[Michael T]

You forgot the satanic/evil numbers, brad. (I'm not kidding, wiki them.)

[MistaPotta]

Dont' forget Icosihenagonal numbers.

[unparseable or potentially dangerous latex formula]

[Michael T]

What...the...heck.

That's just... wrong.

[Englandude]

If Icosihenagonal numbers shows up on the Regional numbersense test.....
That just wouldn't be fair. lol. What if it did show up though? NOOOO. J/k

[Kurt]

I would miss that on a test because I wouldn't have known what an icosihenagon is, lol.

Now I know, I guess. :D

[Michael T]

a 21-gon = icosihenagon?

#15 on math @ regionals: which of the following is the correct name for a 21-gon?

[Mr. Mustang]

Don't forget your Powerful #'s, your Achilles #'s, your Weird #'s, your Untouchable #'s and of course, our very favorite, the Sublime # (for all intents and purposes, sublime is singular, since there are only two known ones...12 and a 50+ digit monster that I feel confident even Larry won't put on either test...is it just me(us) that think the whole freaky # set questions have gotten out of hand...I know from talking to Larry that the original intent was to cause students and coaches alike to search for, study, investigate, etc various number sets for the pure enjoyment of the sport...however, when you get asked an off-the-wall type of number set that has never been asked before, I really don't think that is the essense of what he was trying to accomplish...what everyone is doing is memorizing the 1st 4-5 numbers of each of the aforementioned sets, with no regard for what or how these numbers were derived...I and most of my fellow coaches would much rather see him limit the type of number set to 5-6 of his favs and then expect you to understand how to identify numbers in that set. Perfect example, although indirect, was the sum of the factors of 28...by knowing it was a perfect number, you then knew it's factor sum was twice 28, by definition...I love that question...The multiple choice question, "Which is lucky?", not so much...(BTW, 2/3 of my team got it, while my top player again left it blank out of principle...both situations are a no-gooder...neither of them had a clue, just guessed...would hate for a State Team Championship to be decided on this...and since I am new to the forum, I am Chuck Thompson, Math/Science Coach at City View HS in Wichita Falls...we are 2A...I enjoy listening to all you guys discuss things...carry on.

[Kurt]

[AuSmith]

[zefuri]

i thought icos was 20...

[Kurt]

icos is 20.

Apparently annexing on a "hena" makes it 21. ;)

[MistaPotta]

Icosagon = 20. Icosahenagon = 21. Which is clearly much more. And better.

~MP

[Michael T]

What if I said icoicosagon?

[Michael T]

WAIT! 21 sides = icosikaihenagon.

http://en.wikipedia.org/wiki/Polygon#Naming_polygons

I win?

[stupidityismygam]

direct QUOTE:

In many cases KAI is not necessary.



OWNED....MistaPotta wins

[Michael T]

umm...I can't find that

Where is it in the article?

[stupidityismygam]

cheater, you editted it...

mistapotta is always right, it is his job to right...

[zefuri]

dang these silly numbers that we will never need they should just use 21-gon

[MistaPotta]

I was using the context.

~MP

[zefuri]

is there anyway that people approach estimation because those seem to be the ones i miss? (no kind in particular)

[stupidityismygam]

uhhh well...give me an example or i will have no clue...

basically just round round round away and then add/subtract when you are done