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# Wjec c2 may 2016 Watch

1. No. You should have had something like

0.5(r^2)(2.15) = 0.5(r^2)(pi-2.15) + 26

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2. (Original post by PedanticStudent)
No. You should have had something like

0.5(r^2)(2.15) = 0.5(r^2)(pi-2.15) + 26

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Yeah I got to that part, what happens next?
3. (Original post by kearnsey98)
Yeah I got to that part, what happens next?
Rearrange the equation to get 0.5792...r^2 = 26

Then r^2 = 26/0.5792

R = 6.6999

Therefore r = 6.7

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4. (Original post by PedanticStudent)
Rearrange the equation to get 0.5792...r^2 = 26

Then r^2 = 26/0.5792

R = 6.6999

Therefore r = 6.7

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Yeah I had the same bro!
5. Good job. Did you struggle with anything

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6. (Original post by Elliottmanwaring)
Yeah I had the same bro!
I had that, well done ma boy
7. can someone tell me how they did the laps question because i got a stupidly big number. I was doing sn=750/2 (2(6) + 749(2)
8. (Original post by tinadehban)
can someone tell me how they did the laps question because i got a stupidly big number. I was doing sn=750/2 (2(6) + 749(2)
The point of the question was to get a quadratic to then find n to discover which day he had reached his milestone of 750 laps. You were supposed to put that sn equation equal to 750 and manipulate it into a solvable form and discard the negative solution as you couldn't have negative days

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9. (Original post by tinadehban)
can someone tell me how they did the laps question because i got a stupidly big number. I was doing sn=750/2 (2(6) + 749(2)
should have been 750 = n/2 [2(6) + 2(n-1)]

Where n is the number of laps. After Simplifying and expanding I got either n = -30 or n=25 laps. He can't run negative laps so n = 25
10. (Original post by Jack1066)
should have been 750 = n/2 [2(6) + 2(n-1)]

Where n is the number of laps. After Simplifying and expanding I got 600 laps
I simply used the fact that t12+t13=50 to do t11+t14=50 and t10+t15=50 and t9+t16=50 etc etc. Twelve pairs, all add to 50. 12×50=600

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11. (Original post by 98matt)
I simply used the fact that t12+t13=50 to do t11+t14=50 and t10+t15=50 and t9+t16=50 etc etc. Twelve pairs, all add to 50. 12×50=600

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Oops sorry I gave the wrong answer. I meant n = 30 laps

600 laps was what I got for the t11 thing.

I did the same as you for that one
12. (Original post by PedanticStudent)
Good job. Did you struggle with anything

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Arithmetic, Geometric series but I think I got a few marks on both. The logs one I got until near the end and I confused myself a little. Other than that I found it okay- was a tough paper I'll be honest!
13. (Original post by Jack1066)
Oops sorry I gave the wrong answer. I meant n = 30 laps

600 laps was what I got for the t11 thing.

I did the same as you for that one
Never do that again. You sent me into a panic lol

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14. Has any one else noticed that the difficulty of the papers since like 2014 is greater than what it was up to those dates! Kinda unfair- like 2012 both Jan and Summer were soo easy to do when revising. Comparing them to today's exam is like comparing two separate courses less in terms of Mathematical difficulty but the way in which the questions are asked.
15. does anyone remember the description for the triangle question
will pay with body
16. (Original post by Elliottmanwaring)
Has any one else noticed that the difficulty of the papers since like 2014 is greater than what it was up to those dates! Kinda unfair- like 2012 both Jan and Summer were soo easy to do when revising. Comparing them to today's exam is like comparing two separate courses less in terms of Mathematical difficulty but the way in which the questions are asked.
I was revising from aqa and edexcel papers for that reason.

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17. (Original post by MorganHill)
does anyone remember the description for the triangle question
will pay with body
Possibly the weirdest comment I've seen in TSR, congratulations.🤓🙃🙂
18. (Original post by Elliottmanwaring)
Has any one else noticed that the difficulty of the papers since like 2014 is greater than what it was up to those dates! Kinda unfair- like 2012 both Jan and Summer were soo easy to do when revising. Comparing them to today's exam is like comparing two separate courses less in terms of Mathematical difficulty but the way in which the questions are asked.
Yeah I did like every C2 paper in preparation for this exam and I definitely noticed a jump in difficulty in recent years. I think its because of increasing pressure on the entire A level system, as people are complaining that A levels are too easy, because people keep getting greater results every year. Even after the tests jumped up in difficulty, there were still a record number of high grades.
19. (Original post by Elliottmanwaring)
Possibly the weirdest comment I've seen in TSR, congratulations.🤓🙃🙂
that's not a description of the triangle but thank you
offer still stands
20. (Original post by MorganHill)
does anyone remember the description for the triangle question
will pay with body
Side AB: x cm
Side AC: 7cm
Side BC: x+5 cm

Where x = 15

Cos A = was -3/5

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