2015 Raytheon MATHCOUNTS National Competition

The 2015 Raytheon MATHCOUNTS National Competition was held May 7-10, 2016 in Boston, MA.
Find out more about the MATHCOUNTS Competition Series at www.mathcounts.....

[@Pavanthetechboy]

Benq is now one of the best competitive programmers

[@aarushprasad4493]

WAIT THATS THE SAME GUY?

[@xiaoxia7874]

Ben was really really good.He deserved to be in the finals.

[@WrathofMath]

"A couple minutes" I broke out laughing.

[@Lokikikiki]

Ben’s reading speed is faster than light 😂

[@aarushprasad4493]

they get the problem a few seconds before we do

[@aarushprasad4493]

my bad, exactly 1 second. like probably exactly one second, I went through the timer using the , and . buttons. we get the problem 60 frames after they do. since they said ten seconds at 20:39, the problem must have appeared at 20:04, but we got it 60 frames after that so a second later

[@michaelempeigne3519]

Finding the sum of the reciprocals of the factors of 48 can be found like this 48 = 2^4 * 3^1 [ ( 1 + 2 + 2^2 + 2^3 + 2^4 ) / 2^4 ] * [ ( 1 + 3 ) / ( 3 ) ] = [ (2^5 - 1 ) / 2^4 ] * ( 4 / 3 ) = 31 / 12

[@Zonnymaka]

26:36 The data of the problem were wrong. The official answer is 54, so L=36 and W=18. Hence the area of the black region is (36-4)*(18-4)=448...not 416.

[@chemicalbrother5743]

No, the data were right, the area of the black region is 36*18=648, the area of both regions together is (36+4)*(18+4)=40*22=880, the area of the white region is 880-648=132 and 132 is exactly 416 less than 648, as described.

[@bestredditstories1158]

Chemical Brother How did you come to that answer?

[@aarushprasad4493]

they say 416 is the difference in areas

[@joebob4370]

LET'S GO NATHAN

[@sudarvizhidurairaj3260]

Which one

[@victorbaxter5343]

that loop worthy video is important videos worthy

[@FirstPrinciplesFirst]

Why does this not have as much viewership as the spelling bee competitions?

[@polynesianwarrior2166]

It's hard to defeat 1.3 billion people in youtube views 😂

[@drew75123]

i am still in the first question

[@latestcreator5466]

Luke is an icon

[@racquelsabesaje4562]

radius 1 inch diameter 2 inches + 1 1 2 2 2+2=4+1=5

[@sallyxu4668]

12:31 first thing national champ does: checks his pencil

[@saga3273]

This is Way Better than Spellbee

[@vineethvanga8811]

I love how they added that classic chicken rabbit!

[@klein-zoo]

2:08 nathan's laugh

[@hoangdang7025]

Reading key words. All he sees is: cutting ribbon -> 15 -> one-third -> how long should = 5. The rest is just details.

[@TsukiRaiki]

i don’t understand why i’m watching these. i sucked at math in school. went to summer school just to graduate high school and college was a little better i guess but for some reason I CANT STOP WATCHING THESE COMPETITIONS

[@aarushprasad4493]

no one asked for your depressing life story

[@xiaoxia7874]

and also what is nathan hu laughing about?

[@deepTh00ught]

Ben had definetly deserved that ,just unluck

[@davidjones8047]

2:01 didnt even get to see the question

[@allanyuan2656]

The quality is really bad :(

[@yashmishra6861]

is he Benq from Codeforces??

[@gena8414]

yup

[@racquelsabesaje4562]

2 km/hr 1 hour 45 minutes 12 km 2km 2km 6 km 2 km 12 km 4+2=6

[@prathikkannan3324]

godsend speed, I can do almost all of these under 30 seconds, but the speed they do it at is ridiculous

[@racquelsabesaje4562]

2 foot 416 ft 2

[@yjb5209]

wooooo colin tang and edward wan

[@youphyrun]

9:44

[@racquelsabesaje4562]

1 inch

[@racquelsabesaje4562]

2 km/h 6km 12 km 6km 1 hour 45 minutes

[@racquelsabesaje4562]

91-4 87-1 =86

[@racquelsabesaje4562]

6 km

[@racquelsabesaje4562]

100

[@racquelsabesaje4562]

4 4 cm pi

[@racquelsabesaje4562]

4 91

[@son9257]

sheeeeeeeeesh

[@racquelsabesaje4562]

86

[@racquelsabesaje4562]

1/n 0.003

[@racquelsabesaje4562]

3

[@racquelsabesaje4562]

5

[@racquelsabesaje4562]

26

[@racquelsabesaje4562]

24

[@damdamy4201]

ohhhh

[@racquelsabesaje4562]

5 pi

[@racquelsabesaje4562]

54

[@racquelsabesaje4562]

286

[@1234s6]

11:00 , The greatest possible value of (n+1)!/n^(n-1). The answer is wrong! They said 3. But the correct answer is obviously 2.

[@taopaille-paille4992]

aeroO bics 3 is obviously correct 3!/2

[@kushaagra098]

its asking for greatest possible value of the expression, not the value of n resulting in the greatest possible value of the expression. n = 2 gives you 3. 3 is the greatest possible value.

[@1234s6]

(V_k = velocity. V_1 being the velocity of the first 6km. V_2 being the last 6km.) We have v_2 = v_1 + 2. So, (V_1 + V_1 + 2)/2 = 12/1.75 = 12/(7/4) = 48/7 ---> V_1 = 41/7. Which is very close to 6 but not quite.

[@taopaille-paille4992]

Incorrect again. v must verify 7/4 = 6/v + 6/(v+2), you speak too fast

[@defiant-flounder3948]

It’s 6 guys

[@racquelsabesaje4562]

math

[@DivinesLegacy]

Who are you talking to

[@alanhowitzer]

So difficult

[@teliz10]

Jealous?? Bro you literally an adult get a job

[@louiseternalendlegend2124]

Luke?

[@polynesianwarrior2166]

Don't underestimate benq he is 8th grade, while Luke is not qualify 6th grade

[@Coco73421]

heheheha

[@gsmshew1101]

No Luke 0/10

[@gotentk4]

wtf? get your fanboy out of here? boohoo he wasn't in 6th grade to qualify

[@jack.1.]

The guys seem very inconsistent, clever one second but very weak the next.

[@Iamthemfgoatt]

Jack Ward They’re better than you at least

[@ultearmilkojohn1145]

when would u say they were weak?

[@marcelbergmann9817]

Benq is now one of the best competitive programmers