HARDEST MATH PAPER IN THE HISTORY OF IGCSE 0580 MATH 42 DISCUSSION

[Ratatat]

Seems to be a lot of disagreement on the last answer

I'll put in my vote for n=20 (that's what I got)

 

[uzair shahid]

You multiply by 4. The arc AC has 2 triangles there: AOB and BOC. The angle MOB = 39, which makes up for a half of ONE OF THE TRIANGLES. Which means there are 3 other halves left to account for. Therefore the angle AOC = 39*4.

(360-39*4 = 204 ---- (204/360)*2(8.5)*pi = 30.264 = 30.3 (3 s.f.))

[That's what I got anyway]

well its wrong.

 

[Relon]

You multiply by 4. The arc AC has 2 triangles there: AOB and BOC. The angle MOB = 39, which makes up for a half of ONE OF THE TRIANGLES. Which means there are 3 other halves left to account for. Therefore the angle AOC = 39*4.

(360-39*4 = 204 ---- (204/360)*2(8.5)*pi = 30.264 = 30.3 (3 s.f.))

[That's what I got anyway]

I follow the same procedure and got the same answer

 

[Princess Raven]

well its wrong.

well maybe ur wrong.. unless somehow u knew the paper before.. STOP telling ppl ur wrong GOD

 

[Rashique]

speed of water

1744 I guess

 

[naumanahmad]

I was surprised at paper 42! It was one of the hardest papers I've seen (and I've done tons of past papers)

I got goosebumps when I saw the last questions

 

[naumanahmad]

same

Me i got n=20

same here, I 360 by the angle above and then rounded it off!

 

[naumanahmad]

yeah it was 19 triangle i agree but here's the trick they asked for the point if u remember i don't know how to explain it but they werent asking for the number of triangle i am almost 100% sure it is 20

yes, when you subtract 1 from 20, you get 19 (the number of triangles where 19) as there was also a empty space left in the circle!

 

[naumanahmad]

In the last question, who got n=20?

ME!!!!!!!

 

[Ram Ramiro]

speed of water

Hahahahaha! That was the easiest question! The rest of the paper was a pain in the ass!

 

[naumanahmad]

only people who used their brains will understand this

you also got 2o right?

 

[naumanahmad]

Hahahahaha! That was the easiest question! The rest of the paper was a pain in the ass!

what was your answer?

 

[sj0007]

well its wrong.

well u no wat at first i also did the same thing....bu while rechecking i realised they want the major AC not MN....so we had to multiply 39 by 4 and subtract it form 360.....and find the arc length.....this was the trap in this question and looks like you fell for it!!!

 

[fatima hussein]

yeps AC major arc was 360-78! and i bet u fell for it too XD

What did you get for the answer? was it 26.4?

 

[sj0007]

yeps AC major arc was 360-78! and i bet u fell for it too XD

Listen that was major arc MN when they were extended to touch the circumfernce of circle...and sometimes you may have to admit that u're wrong...just go with it......thats a sincere advice

 

[sj0007]

no bro im sure about it... and i know i ddnt make that mistake

fine...then lets wait till the paper is uploaded....so we can know who is wrong...mayb i am wrong ...and btw....i am a GIRL!!

 

[sj0007]

wat r u talking abt?

 

[ZaqZainab]

well u no wat at first i also did the same thing....bu while rechecking i realised they want the major AC not MN....so we had to multiply 39 by 4 and subtract it form 360.....and find the arc length.....this was the trap in this question and looks like you fell for it!!!

I did the same

 

[sj0007]

nothing u giving bio?

No i am anti-bio.....wt abt u?

 

[uzair shahid]

well u no wat at first i also did the same thing....bu while rechecking i realised they want the major AC not MN....so we had to multiply 39 by 4 and subtract it form 360.....and find the arc length.....this was the trap in this question and looks like you fell for it!!!

sorry but ur gonna lose 3 or whatever marks it was.