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lemme suggest you a lil maths test imgur.com/a/RwnSZRM try your best and write answers in comments
2019-02-14 17:42
#1
Poland nastx 
b
2019-02-14 17:43
That's easy. Try a high iq thread hltv.org/forums/threads/1982814/br-math-..
2019-02-15 13:29
#2
 | 
France mdK_ 
41
2019-02-14 17:43
im bad at maths and physics
2019-02-14 17:43
#4
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India Bob__ 
41. Try this one. prnt.sc/mkm77s
2019-02-14 17:46
Is it pi? > f <- function(x) {(1+log((2+sin(x))/(2-sin(x)))*(sin(x)^4))} > integrate(f, lower=-pi/2,upper=pi/2) 3.141593 with absolute error < 3.5e-14 If i wrote the function correctly
2019-02-14 19:08
#53
 | 
India Bob__ 
Nope, not pi. You have to use properties of definite integral to solve this one.
2019-02-15 07:28
screw integrals I'm struggling in it ;-;
2019-02-15 11:52
#115
 | 
India Bob__ 
Lol. Btw first ranked student in the Asian Mathematics Olympiad that I gave last year was Vietnamese ^^
2019-02-15 12:27
:O well I've never attended in, even in district scale :p
2019-02-15 16:16
#149
 | 
India Bob__ 
Btw any idea when is crazyguy coming back to bootcamp? He doesn't reply to non-Vietnamese chat. They have an upcoming tournament very soon.
2019-02-15 17:17
No men I don't follow him, thought he is inactive
2019-02-16 04:07
0 men))
2019-02-15 09:45
#75
 | 
India Bob__ 
no men((
2019-02-15 10:29
The answer is c).
2019-02-15 09:59
#74
 | 
India Bob__ 
Correct, n1. Did you solve it using properties or by using graph?
2019-02-15 10:33
Maybe luck LOL
2019-02-15 11:08
Neither – I used Maple (a math SW) :D Yeah, I couldn't really be bothered to solve it on paper, but I was curious nevertheless, so I got a little help. But if I were to solve it, I would use properties – although I don't really remember the rules/tricks and would have to look it up.
2019-02-15 11:28
I would have done the same lol
2019-02-15 11:28
#76
KQLY | 
Spain LfanT_ 
think its c failed 1 thing on the start
2019-02-15 10:31
#77
 | 
India Bob__ 
no
2019-02-15 10:30
#82
 | 
India Bob__ 
Yes, your edited answer is correct. Did solve it using properties or by graph?
2019-02-15 10:35
#106
KQLY | 
Spain LfanT_ 
properties, i was bored
2019-02-15 11:30
What's the rule for integrating a product of two functions? Or how did you do it?
2019-02-15 11:51
#119
 | 
India Bob__ 
When the upper and lower limits are the same but the only difference being their signs, you have to use this property: Replace x by -x. If f(-x) = -f(x) [That means it is an odd function] = > It's integral is zero. if f(-x) = f(x) [an even function], you have to multiply the integral by 2 and replace the lower limit by 0. In the question, if you observe, you would multiply sin^4x inside the bracket. The first function you would get is an even function and the second one is an odd function, then you integrate them separately. From there, it is very simple.
2019-02-15 12:36
Yeah, I actually remembered something about the interval being "symmetric" and changing the values... looks like I have a lot to catch up on though :D Thanks anyway.
2019-02-15 12:44
#155
 | 
United States gtmaniacmda 
That looks like a pain, not hard to solve, but so much writing, LOL
2019-02-16 05:26
#159
 | 
India Bob__ 
Edit: nvm
2019-02-16 05:47
#165
 | 
Finland anoC 
its 1.178097245
2019-02-16 10:08
#166
 | 
India may_An_K 
Engineering kar raha hai kya bhai
2019-02-16 11:14
#5
Monkey | 
Brazil g8Q0wHY 
is this for 5 yolds?
2019-02-14 17:44
#6
 | 
Germany Roflcopter234 
yes
2019-02-14 17:44
#19
BnTeT | 
Germany cucKing 
+1
2019-02-14 17:46
#45
 | 
Finland sadmen)))) 
its pretty herd men wtf))))
2019-02-14 19:03
yes
2019-02-15 07:19
#79
 | 
India Bob__ 
yes
2019-02-15 10:33
#7
Trashhero | 
Sweden ZAE^ 
41
2019-02-14 17:44
40 + 40 x 0 + 1 80 x 0 + 1 0 + 1 = 1 A is the only answer, anyone who says otherwise needs to go back to school
2019-02-14 17:44
ur trolling? xD
2019-02-14 17:45
#12
frei | 
United Kingdom salad! 
0/8
2019-02-14 17:45
#13
 | 
United Kingdom ifsoreki 
lul
2019-02-14 17:45
bait not gonna work, go home
2019-02-14 17:46
#15
Trashhero | 
Sweden ZAE^ 
0/8
2019-02-14 17:46
#16
 | 
India Bob__ 
xDD
2019-02-14 17:46
#20
 | 
Finland SunMutsi 
Nice try tho
2019-02-14 17:47
#24
allu | 
North America N1tsuA 
Hm
2019-02-14 17:47
#28
 | 
Netherlands K1nexCS 
expected from south africa
2019-02-14 17:48
cmonBruh
2019-02-15 07:41
i wonder why wakanda is fictional
2019-02-14 18:30
#62
Aleksib | 
Finland MoRst 
nt lmao
2019-02-15 07:41
0/8
2019-02-15 09:46
xDDD
2019-02-15 09:52
I don't understand why everyone is laughing. Even Google agrees with me check the screenshot, are you trying to tell me that Google is wrong? Also have a look at Quora description on the first website link. Typical brain-dead hltv imgur.com/a/8fMgsWj
2019-02-15 10:22
#73
 | 
United Kingdom ivolong 
You can't even use Google rip
2019-02-15 10:27
#90
 | 
Switzerland meme_jesus 
You gotta be fucking kidding me Back to school pls
2019-02-15 10:58
#92
 | 
India Bob__ 
2019-02-15 11:01
nt Forsaken, I know you used inspect element on the website
2019-02-15 11:03
#96
 | 
India Bob__ 
lmao do you even know how inspect element works? idiot
2019-02-15 11:05
baited
2019-02-15 11:09
What's your educational qualification???
2019-02-15 13:25
#139
 | 
India Bob__ 
I had scored 248/360 in JEE Main 2018. Right now I am studying B.Tech at CSE from a top NIT.
2019-02-15 13:26
Damn I am a jee aspirant got just 90 percentile in btech jan's And 98 in b. arch But i have no heart for architecture I need your help, guidance anything 'Cause i fucked up jan badly Could have easily scored 100 more with a better planning ;__;
2019-02-15 13:28
#145
 | 
India Bob__ 
PM me your discord
2019-02-15 13:29
#167
 | 
India may_An_K 
Konse nit mein hai....
2019-02-16 11:16
#134
BnTeT | 
Germany cucKing 
+1 even nasa agrees with you i.imgur.com/ohAaZTE.png
2019-02-15 13:19
Thank you NASA, very cool
2019-02-15 13:20
#140
BnTeT | 
Germany cucKing 
elon musk as well actually i.imgur.com/31fMMQc.png
2019-02-15 13:27
What do you expect, Elon comes from South Africa too so of course he can do simple math.
2019-02-15 13:29
#81
xaN | 
France TARES 
lmaooo expected from SA
2019-02-15 10:34
41
2019-02-14 17:44
41
2019-02-14 17:45
#17
 | 
Finland SunMutsi 
B, 41
2019-02-14 17:46
#21
 | 
Panama Cyain10 
1 or 82
2019-02-14 17:47
(40+40) x (0+1) = 80 x 1 answer is 80 so ya all got trolled there isnt even 80 in the answers options
2019-02-14 17:47
+1 one normal man here
2019-02-14 18:50
#44
Savage | 
Austria RRRS7 
40 x 0 = 0 40 + 0 ( 40 x 0 = 0 ) + 1 = 41
2019-02-14 19:01
#25
ZywOo | 
Poland Arknes 
what's so difficult in that?
2019-02-14 17:47
99% have answerd wrong so its hard right ?
2019-02-14 18:53
#41
ZywOo | 
Poland Arknes 
no, because the answer is 41
2019-02-14 18:54
#27
 | 
United Kingdom sam1cs 
you do (40+40) * 0 + 1 so a. 1 give me a hard one
2019-02-14 17:48
#29
 | 
Netherlands K1nexCS 
expected bait from brexit
2019-02-14 17:49
#51
 | 
United States fatburger 
0/8 b8
2019-02-15 07:21
Actual 3Head LUL
2019-02-15 07:42
Oi bruvs, any lads? 3Head
2019-02-15 10:33
#130
 | 
France Alpha7a2 
brexit economist doing math to judge if it's a good choice to leave EU LUL
2019-02-15 12:48
#151
 | 
United Kingdom sam1cs 
this sums up all French people - retards
2019-02-15 22:44
#169
 | 
France Alpha7a2 
trigered
2019-02-16 14:29
wtf so fucking dump people here 80 is the answer
2019-02-14 18:49
#52
 | 
United States fatburger 
?? what
2019-02-15 07:23
#54
 | 
Panama Cyain10 
+1
2019-02-15 07:28
41 ez Use bidmas
2019-02-14 18:54
#55
 | 
Panama Cyain10 
Use what
2019-02-15 07:29
Rules for arithmetics operations, Rule 1 - First perform any calculations inside parentheses. Rule 2 - Next perform all multiplications and divisions, working from left to right. Rule 3 - Lastly, perform all additions and subtractions, working from left to right. Therefore the correct answer is 41 (b).
2019-02-15 07:13
#48
 | 
Panama Cyain10 
Expected answer from Jonathan "Mathematics Phd" E.
2019-02-15 07:15
#56
f0rest | 
Bulgaria squezzi 
lol, ban incoming
2019-02-15 07:33
#120
 | 
Panama Cyain10 
I'm praising his skills and knowledge why would I be banned
2019-02-15 12:33
#57
 | 
India Bob__ 
Cya in 10
2019-02-15 07:34
#121
 | 
Panama Cyain10 
#120
2019-02-15 12:33
#125
 | 
India Bob__ 
that was a joke
2019-02-15 12:39
#59
 | 
India Noobdian1 
Bye
2019-02-15 07:37
#122
 | 
Panama Cyain10 
#120
2019-02-15 12:33
#123
 | 
India Noobdian1 
Ask him that idk
2019-02-15 12:35
#65
Aleksib | 
Finland MoRst 
Hey guys out here knowing math
2019-02-15 07:44
#71
 | 
United Kingdom IgglePiggle 
maths, you do it more than once
2019-02-15 10:13
Expected answer from Jonathan "Mathematics Phd" E.
2019-02-15 10:48
#50
 | 
United States fatburger 
41
2019-02-15 07:21
#58
 | 
India Noobdian1 
41
2019-02-15 07:36
36
2019-02-15 07:38
These tests are always the same shit "do you know in which order the calculations should be done"
2019-02-15 07:39
#70
 | 
United Kingdom IgglePiggle 
the answer to this depends how you were taught and where you put the brackets its either 1 or 41, but how I was taught in the UK 20 years ago is that if there are no brackets you treat it as if there are none and solve the problem in sequence, so 40 40 + 40 = 80 80 x 0 = 0 0 + 1 = 1 But it also depends which rule you are using, so it can also be 40 + 40x0 +1 which would make it 41 In my basic school exam no rules were given and the answer they wanted was 1, but I'm sure if you went into further education on the subject the answer would be different depending what they ask for Maths is fun!
2019-02-15 10:11
#83
 | 
Liberia weALLcheat 
you always multiply before sum/rest,
2019-02-15 10:39
#86
 | 
Switzerland crustclot 
yes, it is international. First powers, then brackets, then multiplication / division and then add and sub
2019-02-15 10:42
#87
 | 
Liberia weALLcheat 
UK brain, no wonder they brexit
2019-02-15 10:43
#97
 | 
United Kingdom IgglePiggle 
yes we are leaving the eu because I cant do maths. I have single handedly ruined my country :(
2019-02-15 11:07
#109
 | 
Liberia weALLcheat 
shame on you, no maths man
2019-02-15 11:47
#91
 | 
Switzerland meme_jesus 
The only correct answer is 41, doesnt matter what you were taught.
2019-02-15 11:00
+1 if you feel like theres room for interpretation you dont know how maths work.
2019-02-15 11:10
#100
 | 
United Kingdom IgglePiggle 
OK I guess I was wrong. I left school 22 years ago give me a break :P Though I still think the part about brackets and rules is correct, there are instances where the answer is 1, I agree I was wrong about the basic rules, if no special rules are present then the answer is 41 Thanks everyone for making me look stupid :P
2019-02-15 11:10
#110
 | 
Liberia weALLcheat 
the asnwere would be one in case (40+40)x0+1 then you sum 80, multiply by 0 and after that sum 1
2019-02-15 11:48
#131
 | 
France Alpha7a2 
" it also depends which rule you are using" NANI ? you choose rule of math nowadays? LUL
2019-02-15 12:50
#132
 | 
United Kingdom IgglePiggle 
the basic rule of maths is BODMAS, but there are others
2019-02-15 12:55
#78
 | 
Norway supremoxd 
The answer is 41. /closed
2019-02-15 10:30
#84
 | 
Switzerland crustclot 
41 now be quiet
2019-02-15 10:40
#85
 | 
Estonia teremartin 
ez 41
2019-02-15 10:42
40+40*0+1 = Selena Gomez?
2019-02-15 10:51
#93
 | 
Denmark God_of_Wisdom 
40 + 40 x 0 + 1 = 80 x 0 + 1 = 80 + 1 = 81
2019-02-15 11:02
#103
 | 
Finland real_fan 
yes
2019-02-15 11:22
but its formulated like shit, should be something like 40+(40x0)+1
2019-02-15 11:04
K time for real questions 1) A ball of mass m and radius r rests on a sled of mass M, which in turn rests on a frictionless plane. If the coefficient of friction btwn the ball and sled is u, what is the maximum horizontal force F that can be exerted on the sled without causing the ball to slide? 2) A uniform stick of length L is pivoted at one end and released from rest in a horizontal position. How long will it take for it to swing down to the vertical position?
2019-02-15 11:23
I haven't done physical equations in quite a few years so I will likely be wrong. 1) umg 2) PI/(2*SQRT(3g/L)) If you want the working out steps I can provide
2019-02-15 12:05
1) no 2) kinda close
2019-02-15 13:24
Welp, I tried, after 6 years you start to forgot things. There's a reason I didn't major in physics in my undergrad :)
2019-02-15 13:27
posted solution below #163 for first one if you're interested
2019-02-16 13:12
#133
 | 
India Bob__ 
1) ug(m + M) => Since the ball doesn't slide, the acceleration of the system will be a = F/(m+M). A pseudo force will act on the ball of value ma and we have to apply equilibrium condition between frictional force and pseudo force for the ball. That is, umg = ma. From there we will get the value of F. 2) (2/sq.rt(3)) * sq.rt(l/g) [By applying law of conservation of energy between horizontal and vertical position]
2019-02-15 13:20
1) you're missing a coefficient before M 2)close, off again by a constant
2019-02-15 13:27
#153
 | 
India Bob__ 
For the first one I am getting the same answer, can you tell me the solution?
2019-02-16 05:14
Let A be the acceleration of the sled relative to the plane, and a is the acceleration of the ball relative to the plane. So you have f = ma and F - f = MA f_r is the total external torque on the ball about its mass center f_r = I*alpha = (2/5)m*r^2*alpha where alpha is the angular acceleration of the ball about its mass center. If the ball rolls on the sled, the points of the ball and sled that are in contact must be at rest relative to each other, so that a + alpha*r = A f_r = (2/5)*m*r^2((A-a)/r) f = (2/5)*m*(A-a) combine f = ma to get A = (7/2)a and F = ma + MA = (7/2 M + m)a and we know that f < or = uN = umg so ma < or = umg and a < or = ug thus maximum horizontal pull on the sled with no sliding of the ball is F = ((7/2)M + m)ug
2019-02-16 09:53
#164
 | 
India Bob__ 
oh right, I didn't use rotational mechanics in that question.
2019-02-16 09:57
#107
 | 
Germany 2k19 
try this easy one. Quick maths. i.imgur.com/d6OXieb.jpg
2019-02-15 11:31
"the 21 hardest math questions" "easy one"
2019-02-15 11:35
#111
 | 
India Bob__ 
2
2019-02-15 11:51
#128
Happy | 
Germany NatsuS 
I erased all this sin cos stuff. The one thing in math I denied to learn.
2019-02-15 12:43
#157
 | 
United States gtmaniacmda 
H. 2
2019-02-16 05:33
#116
 | 
Russia slyfoxxdd 
41
2019-02-15 12:29
#117
shox | 
Poland dGe_GoD 
82
2019-02-15 12:30
#118
shox | 
Poland dGe_GoD 
What I won?
2019-02-15 12:31
#136
 | 
India Bob__ 
n0thing
2019-02-15 13:22
#124
 | 
Romania SkipLD 
6x28y
2019-02-15 12:38
0123456789 the answer is among those numbers
2019-02-15 12:40
#127
Happy | 
Germany NatsuS 
41
2019-02-15 12:41
#147
 | 
Slovakia escapeiztop 
(40+40x)*(0+1)=0 80x=0 x=0 people are so uneducated wow
2019-02-15 13:33
#154
 | 
Switzerland sovereiign 
all calculators say it's 1.
2019-02-16 05:21
#156
 | 
India Bob__ 
not the scientific calculator
2019-02-16 05:29
#158
 | 
Switzerland sovereiign 
I don't know how to use those features ;) Dude, it's been so many years since I was in high school I don't remember any of that crap because I never used it again. Funny thing is though my job requires me to do math constantly as I'm a carpenter but for that all you need to know are the basics of adding, subtracting, multiplying. and dividing. I also deal with fractions a lot since I use imperial and of course things like finding averages and a bit of basic geometry.
2019-02-16 05:34
#160
 | 
India Bob__ 
It's alright mate, I was just saying that scientific calculators can apply BODMAS rule.
2019-02-16 05:48
#161
 | 
Switzerland sovereiign 
I never had to use calculators because I can do math in my head really well so I didn't learn how to use a scientific calculator. I also never took any higher math classes in school because I knew I would never use it.
2019-02-16 05:51
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