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AMC and other contests, summer programs, etc.
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Contests & Programs AMC and other contests, summer programs, etc.
AMC and other contests, summer programs, etc.
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generic whiteboard problem
ostriches88   19
N 17 minutes ago by happypi31415
Source: 2024 AMC10B p16
Jerry likes to play with numbers. One day, he wrote all the integers from $1$ to $2024$ on the whiteboard. Then he repeatedly chose four numbers on the whiteboard, erased them, and replaced them with either their sum or their product. (For example, Jerry's first step might have been to erase $1, 2, 3$, and $5$, and then write either $11$, their sum, or $30$, their product, on the whiteboard.) After repeatedly performing this operation, Jerry noticed that all the remaining numbers on the board were odd. What is the maximum possible number of integers on the board at that time?

$
\textbf{(A) }1010 \qquad
\textbf{(B) }1011 \qquad
\textbf{(C) }1012 \qquad
\textbf{(D) }1013 \qquad
\textbf{(E) }1014 \qquad
$
19 replies
+1 w
ostriches88
Nov 13, 2024
happypi31415
17 minutes ago
Problem 2
evt917   46
N 34 minutes ago by AbhayAttarde01
Source: 2024 AMC 12B #2 / AMC 10B #2
What is $10! - 7! \cdot 6!$?

$
\textbf{(A) }-120 \qquad
\textbf{(B) }0 \qquad
\textbf{(C) }120 \qquad
\textbf{(D) }600 \qquad
\textbf{(E) }720 \qquad
$
46 replies
evt917
Nov 13, 2024
AbhayAttarde01
34 minutes ago
No more topics!
10a vs 10b
golden_star_123   125
N Today at 5:17 AM by wuwang2002
Post the difference between your 10a and 10b score!
125 replies
golden_star_123
Nov 13, 2024
wuwang2002
Today at 5:17 AM
10a vs 10b
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happyfish0922
140 posts
#112
Y by
newton_24 wrote:
120 difference.
Due to internet issue my AMC 10 A got messed up. :wallbash_red:

:rotfl: :rotfl: :rotfl:
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AoPS-Av
299 posts
#113
Y by
10a 105, 12b 96
idk how i got so close even though one is way harder than the other (12b no sillies tho, 10a 3 sillies :wallbash_red: )
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GYRAD0S
6 posts
#114
Y by
10a 88.5, 10b 102
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MathLoverYeah
6 posts
#115
Y by
-4.5 on 10b i should have looked at the end
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LusenYao
8 posts
#116
Y by
mine went up by 4.5... if i didn't make any sillies on both tests it would've gone up 1.5
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lovematch13
510 posts
#117
Y by
132 -> 120 I somehow unlocked in on B but people did better on B so I should be okay for JMO qual if I do good on aime
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krithikrokcs
132 posts
#118
Y by
145.5-> 144 I SILLIED ON 10B I COULDVE PERFECTED AAAAAAAAA
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vincentwant
1135 posts
#119
Y by
145.5 on 10a is orz pro max
i got 111 on 12a oops
This post has been edited 1 time. Last edited by vincentwant, Today at 1:37 AM
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BS2012
536 posts
#120
Y by
krithikrokcs wrote:
145.5-> 144 I SILLIED ON 10B I COULDVE PERFECTED AAAAAAAAA
you're not alone
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abbominable_sn0wman
34 posts
#121
Y by
22.5 point differential...i sillied 5 problems on the A :noo:
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Challengees24
432 posts
#122
Y by
vincentwant wrote:
145.5 on 10a is orz pro max
i got 111 on 12a oops

yall he took the 10a and 12a :skull: :rotfl:
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aleyang
178 posts
#123
Y by
Got my score for 10B back today
I got 93 for 10A (4 sillies and spent too long on the earlier problems) and 132 for 10B
39 point difference
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MathRook7817
234 posts
#124
Y by
guys, do you think a 132 on 10a will dhr it
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Challengees24
432 posts
#125
Y by
MathRook7817 wrote:
guys, do you think a 132 on 10a will dhr it

yes but on the right on the edge
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wuwang2002
1127 posts
#126
Y by
exact same for both 10a and 10b
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