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Mr M's Edexcel GCSE Linear Mathematics Higher 1MA0 Paper 2 Answers November 2015

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Q20: Watch A was 100% plastic
Watch B was 340° plastic and 20° metal.

Cost is in ratio 3:2 for metal and plastic.

360 x 2 = 720
340 x 2 = 680
20 x 3 = 60
680 + 60 = 740

740 / 20 = 37
720 / 20 = 36

So ratio is 36:37.

It was a pretty easy question, but I like many others fell into the trap of working out the area of the sector/circles. But it was only 4 marks.

so would u get no marks for working out the area of the circle??

Reply 61

ad4m

Original post by Kmohazeb

so would u get no marks for working out the area of the circle??

I'm not quite sure, but considering it doesn't go towards the mark i would think not. However, it might've been possible still to find a ratio working it out that way. I would say no for now.

Reply 62

sairajay

Could you help me with 15b, 19 & 24?
I dont remember any of the questions.

Reply 63

starshine909

Original post by ad4m

I'm not quite sure, but considering it doesn't go towards the mark i would think not. However, it might've been possible still to find a ratio working it out that way. I would say no for now.

I think I wrote 360 divided by 5 (because the ratios added up to 5) and 340 divided by 5 then multiplied it with the area of the circles or the ratio or something among those lines idk...looking at the question now is easy! just annoys me that I didn't get it right during the exam...

(edited 8 years ago)

Reply 64

ad4m

Original post by Kmohazeb

I think I wrote 360 divided by 5 (because the ratios added up to 5) and 340 divided by 5 then multiplied it with the area of the circles or something among those lines idk...looking at the question now is easy! just annoys me that I didn't get it right during the exam...

Yeah me too! if it was nearer the front I would've done it easily. But they put some easier questions at the back to confuse us!

Reply 65

ad4m

Does anyone have a copy of the values used in Q24? I don't have a copy of the paper and need the values to work out the answer? I remember the angle was about 40° but can't remember the length?

Reply 66

TaraG9238

What if you didn't simplify??,,

Reply 67

ad4m

Original post by TaraG9238

What if you didn't simplify??,,

I reckon you'd still get 3 marks out of the 4.

Reply 68

Mr M

Study Forum Helper

Original post by Kmohazeb

so would u get no marks for working out the area of the circle??

1 mark I expect.

Reply 69

Pastels123

For the stratified sampling question I wrote 10 instead of 9. Does this mean I will drop a mark?

Reply 70

harry412

I didn't simplify the probability on the last question. Would I lose any marks?

Also, what was Question 11a?

Reply 71

ad4m

Original post by harry412

I didn't simplify the probability on the last question. Would I lose any marks?

Also, what was Question 11a?

No, you wouldn't lose any marks (you dont usually need to simplify unless asked normally, they'll accept both answers)

Question 11a was:

3x2 = 147
Answer x = 7