Maths exam IGCSE - HIGHER TIER - PAPER 3H AND PAPER 4H POST DISCUSSION.

Although I got 4 for the scale factor I'm positive it was actually 5! Makes so much more sense. But hopefully there will be some error carried forward marks even if you did do scale factor 4

i think its scale factor 4 because the area scale facotr is then 16 which makes perfect sense for the last question in that one

Yep y= 2/3x +5
As it had to pass through (6,9)
Took me ages to work out though haha!

i think its scale factor 4 because the area scale facotr is then 16 which makes perfect sense for the last question in that one

1st question i got 45, then 1:150. For the surface area of the cube i got 73.5, for the last one i got -4, 32 and 2.5 and 12. For the gradient one i got 2/3x plus 5. For the india one i got 40.4 percent. for the 3 positive integers with mean of 4 and range of 7 i got 1,3,8. For the peas question i got 3.12, 13/25, 1/10, 1/30

yes 1:150. and 45 for that aeroplane or 54?

and for the scale factor enlargement one i got 14, 3.8, then 50 as i think the s.f was 5

I also tried it on a random number ie 100 . Theres now 120 . 17% of that now is 20.4 .
120 + 20.4 is 140.4

Original is 100
Result 140.4
How much has it increased by then :')

yes all true but how did u get that lower bound one, surface area? wasnt it 12.25 after getting 3.5?

i got 4 over 25

and for the scale factor enlargement one i got 14, 3.8, then 50 as i think the s.f was 5

I am almost certain that's wrong, it's 1/10.
P(2,2 + 3,1 +1,3) = 1/10

I think i got
1a) 45
1b) 1:150

can someone run through the answers for Q2) about putting in the correct numbers into that A = kx (something like that!)

How did you do the y = mx + c thing & the gradient?