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Edexcel IGCSE Higher tier Mathematics A Paper 2 2H (4MA1) - 7th June 2023 [Exam Chat]

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Reply 80

spxn

Original post by Suleiman123

What did u guys put for x the one where u couldn’t use ur calculator. I got like 3 + root20

2 + root5 because it was x^2 = 9 + 4root5 which goes to 2 + root5

Reply 81

spxn

Original post by themonke

Im gonna try spill out as many answers as i can remember:
54 times for the pink counter
10 for coin question
12 for the score question
2+√5 for the cuboid
59.2 for angle of elevation
Coords of D was (4.6, 8)
Simultaneous eqs were (2, 1) and (-16/7, -3/7)
Upper bound for density was 9.56
Formula for Q was 3√t, % increase was 44%
Probability for two yellows was 5/9
Probability for at least one red was 219/220
Completing the square was 3(x-1)² + 2
Reflex angle was 288 degrees
The three graphs were C, F and A
Lmk if any are wrong and I should change them

There was like 2.68 for the find CD or something where one angle was 38, hypotenuse was 14 and other length was 8 yk which one I mean

Reply 82

nerfgun2

bruh im gonna shoot myself i worked out the surface area for the cuboid and my stupid brain couldn't figure out why it wasn't working ffs and now I figured it out. kms

Reply 83

Ut12345

Wasn't the circle theorem 228.
And for the other ones 90 and 22

Reply 84

Ut12345

Original post by Ut12345

Wasn't the circle theorem 228.
And for the other ones 90 and 22

The angles were 42, 90 and 90 For the first one

Reply 85

lili-b

Original post by Ut12345

Wasn't the circle theorem 228.
And for the other ones 90 and 22

I got the 90 and 22…wasn’t it bc of like angle in a semicircle and angles in the same segment are equal?

Reply 86

Suleiman123

Original post by dachemist

No you are wrong. It was definetly 2+√5

Chill out broski

Reply 87

jonnycull

what was the answer for the probability question about the red and green beds

Reply 88

ted_tdm

anybody forget that there was a question on the last page

Reply 89

themonke

Original post by jonnycull

what was the answer for the probability question about the red and green beds

I put 219/220

Reply 90

ted_tdm

how was the kite questions done?

Reply 91

Ut12345

Original post by themonke

I put 219/220

How?

Reply 92

lili-b

Original post by Ut12345

How?

I did 1 - the probability of all red taken. I like drew out the whole tree 😭😭

Reply 93

Kr1sh.05

Original post by Harshi_789

i thought angles in the same segment are equal so shouldnt it be 28 degrees for the circle theorem question

Yes I put 28 to

Reply 94

susiepowell

Original post by ted_tdm

how was the kite questions done?

think there were many ways to do it but i found line of symmetry which was AC and then reflected b in it idk if i got it right though

Reply 95

ted_tdm

Original post by susiepowell

think there were many ways to do it but i found line of symmetry which was AC and then reflected b in it idk if i got it right though

were you meant to do a simultaneous equation with that line

Reply 96

spxn

Original post by susiepowell

think there were many ways to do it but i found line of symmetry which was AC and then reflected b in it idk if i got it right though

You had to draw the diagonals of AC and BD,
Find the gradient of AC, then do:
m of AC = -1/m of BD
Then find ‘c’ for lines AC and BD by substituting x and y values into the equations for the Lines AC and BD respectively.
Then set the equation of AC = to the equation of BD which would give you the x-coordinate of the point of intersection of line AC and BD but also the x-coordinate of the midpoint of line BD.
Then substitute the x value back into the equation of line BD to find the y-coordinate of M (the midpoint).
Then do (x of B + x of D)/2 = -0.4 (that’s what the x coordinate of M was)
And then (y of B + y of D)/2 = 6 (y coord of M)
You know the X and Y coordinates of B already (I think they were -27/5 and 4 respectively) so just rearrange to find the X and Y coordinates of D