Maths derp moments (3 Viewers)

[iBibah]

What are some silly and derp mistakes you've made while doing maths? (Exam or study)


The one that haunts me for life is in year 10, apparently 80-6=76.....

 

[Queenroot]

10x5= 15

 

[fionarykim]

there was once when i was doing trig
and i was looking at a Q a and b
and i couldnt tell the difference between the questions, i was like wtf they are the same
so i ask my teacher... and he looked at me so funnily

because a) was sinx
b) was tanx
that was the diff ==

 

[RayRay]

10min ago i was questioning myself how to do reverse chain rule integration. bahaha

 

[Recondit]

6!=120 @super_SAIyan2

 

[nerdasdasd]

2 x 3 = 5... LOL

 

[Carrotsticks]

2 x 3 = 5... LOL

How's that a derp moment? 2x3 IS equal to 5.

 

[sarahabc123]

For me, no matter how easy a calculation is, I'll always check it with the calculator. E.g 3x4. I tend to make heaps of silly mistakes. ( I lost 10 marks in my trials becoz of this :$ )

 

[RayRay]

I failed a simple integration question in trials. It was a simple sin substitution question, but me being silly and thinking too far ahead, knew that when subbed into sqrt(1-x^2) would give cos. So i subbed cos in as the initial condition. bam 4 marks gone. ffs.

 

[sarahabc123]

I failed a simple integration question in trials. It was a simple sin substitution question, but me being silly and thinking too far ahead, knew that when subbed into sqrt(1-x^2) would give cos. So i subbed cos in as the initial condition. bam 4 marks gone. ffs.

I've had many moments like that. Only, This is with general maths o.o but that's usually because I overthink the questions too much.

 

[iBibah]

I've said the circumference of a circle is pi r^2 a couple of times in mechanics


Edit: I meant volumes :/

 

[Carrotsticks]

I've said the circumference of a circle is pi r^2 a couple of times in mechanics

Oh you mean like this individual?

 

[iBibah]

Oh you mean like this individual?

Yep kinda, though I don't top the state in maths competitions

 

[yasminee96]

2012 Maths HSC ... 0.4 x 10 = 400 -_-

 

[Sy123]

Got 2012 MX1 Q1 MC wrong
The question asked to prove, A > B, I proved A > B, and concluded by writing down that A < B, losing the mark
In a 2U exam last year I managed to get one of the very first questions wrong, those ones where they ask you to simplify something really simple
Recently in the 2U marathon I said that ln(x) = -1 had no real nor complex solutions
MULTIPLE times I would try to do a question especially in geometry skimming the information given in the question and only going by the diagram. I find later that I miss crucial information and that my previous 10 minutes or so attempt were futile.
Just browse 3U, 4U, Integration marathons to get some more derp moments

etc etc

 

[panda15]

In my Ext. 1 trial, I wrote that 6-6=1. Definitely not my finest moment.

 

[hyphea]

writing cis theta as cos theta

 

[yasminee96]

writing cis theta as cos theta

omg always happens

 

[NeonGreen]

Trying to use cos rule on a sine rule question for like 10 minutes during an exam... I literally sat there thinking "THIS QUESTION IS IMPOSSIBLE" and then walking out and being like AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHHHHHHHHHH crap. It was frickin' sine rule.

 

[AsianFrustratio]

Extension half yearlies: 2-1=1

Yeah.