I need help!-tpulak

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0 replies

jlacosta

Mar 2, 2025

0 replies

MATHCOUNTS on ESPN

rrusczyk 24

N an hour ago by aidan0626

ESPN noon EST - the Countdown round of Nationals.

(Disclaimer: yours truly is an 'analyst' for the broadcast.)

24 replies

1 viewing

rrusczyk

May 27, 2003

aidan0626

an hour ago

Chances of mathcounts nats qual

stjwyl 81

N an hour ago by mathelvin

Info:
In 8th grade so I'm really hoping I can make nats now

I currently mock around 38 - 40 on nationals questions from 2015+
I mock anywhere from 37 - 42 on state questons from 2020+

For the sprint round I also have noticed that the difficulty jump from questions around 19 and 20 to questions around 22 and 23 has been really large (starting from 2023). I've also noticed that the last three questions (also from 2023 ->) are IMO impossible to do in the 40 minutes.

On target I can get 7/8 or even 8/8 if I'm lucky but it's possible for me to get 6/8

I'm in MA :sob: really hard state so do I have a chance

Edit: Just mocked the 2022 state round and got a 41 (29 sprint, 12 target :sob:)

Currently putting around 3 hrs or so a day and I have been for the past 2 months
States is 3/1 for me :sob:

so am i cooked

81 replies

stjwyl

Feb 21, 2025

mathelvin

an hour ago

Mathcounts STRATEGIES

Existing_Human1 17

N 2 hours ago by mathenrichmentaops

Hello commuinty!

I am wondering what your strategies are for mathcounts. Please note I do not mean tips. These can be for all rounds, but please specify. BTW, this is for state, but it can apply to any competition.

Ex:
Team - sit in a specific order
Target - do the easiest first
Sprint - go as fast as possible

I just made up the examples, and you will probably have better strategies, so if you want to help out, please do

17 replies

Existing_Human1

Yesterday at 7:27 PM

mathenrichmentaops

2 hours ago

Mathcounts state iowa

iwillregretthisnamelater 6

N 2 hours ago by iwillregretthisnamelater

Ok I’m a 6th grader in Iowa who got 38 in chapter which was first, so what are the chances of me getting in nats? I should feel confident but I don’t. I have a week until states and I’m getting really anxious. What should I do? And also does the cdr count in Iowa? Because I heard that some states do cdr for fun or something and that it doesn’t count to final standings.

6 replies

iwillregretthisnamelater

Yesterday at 4:55 AM

iwillregretthisnamelater

2 hours ago

No more topics!

I need help!-tpulak

tpulak 4

N Yesterday at 1:40 AM by PojoDotCom

Hello peoples:
I need help on a problem. If you know the solution, could you please post it, and tell me how to do it? Here is the problem:
"The product (66)(9)(22)(39) has a prime factorization of the form (2A)(3B)(11C)(13D). What is the value of ac-bd? "

{Note: 2a actually represents "2 to the power of a", same goes for 3b,11c, & 13D}

PLEASE HELP ME! :?: :!: :!: :!:

4 replies

tpulak

Nov 30, 2007

PojoDotCom

Yesterday at 1:40 AM

I need help!-tpulak

G H J

Reveal topic tags

number theory

prime factorization

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tpulak

50 posts

tpulak

#1 h Nov 30, 2007, 2:39 AM • 2 Y

Y by Adventure10, Mango247

Z K Y

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SnipedYou

174 posts

SnipedYou

#2 h Nov 30, 2007, 2:44 AM • 3 Y

Y by Adventure10, Mango247, and 1 other user

Hint: Write out the Prime factorizations of each of the multiples

Solution

So we have

$66 = 11 \cdot 3 \cdot 2$
$9 = 3^{2}$
$22 = 2 \cdot 11$
$39 = 13 \cdot 3$

So it can be written as $2^{2}3^{4}11^{2}13$

So $a = 2$
$b = 4$
$c = 2$
$d = 1$
and $ac - bd = 0$