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Mathematics: Applications and interpretation
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Barcelona, Spain, 14 - 16 February 2025
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Mathematics
IB MYP Category 2

Paris, France, 21 - 23 February 2025
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Mathematics: Analysis and approaches
IB DP Category 2

Berlin, Germany, 28 February - 2 March 2025
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Subscriber comments

Siddharth
HL Functions - Exam Questions
For k = 4.01, shouldn´t c) give an answer of 5.34890875951 ?
9 Dec 2024
Eduardo
SL Accuracy and Estimation - Online assessment
There is an error in question 6 since it says that the length is 32m when it should be 36m.
4 Dec 2024
Emily
SL Exam Paper 1D
Also, can you please change the answer key for #5, since the height should be 25, not 50.
22 Nov 2024
Emily
SL Exam Paper 1D
Is Q4 (a) and (b) correct? If I use the midpoint of the frequency table, I got different values for both of them. (I got the mean as 268 and standard deviation as 63.6)
22 Nov 2024
Ewa
HL Functions - Exam Questions
Thanks for such a speedy response, Oliver!  Much appreciated ;)
7 Nov 2024
Oliver
HL Functions - Exam Questions
Hi Ewa, thank you, I agree 👍 I'll update the solutions this week-end with this second option of k = 4.00614 (4.01 to 3sf) which would then give a height of 2.91m for peg 'B' (to 3sf) in part (c). 
6 Nov 2024
Ewa
HL Functions - Exam Questions
Hi!  I have just been working through Q2 about the LED lights and have a question. Why is the solution for k only 0.25? When I solve this on the GDC, I can see 4 intersection points. I can convince myself that the negative solutions for...
6 Nov 2024
Jim
Samples Apples & T-tests
Thank you Man Yee, Fixed, Thanks, Jim  
2 Nov 2024
Jim
SL Tangents & Normals
Thanks Emily! I'll put that right - they should be with the tangents questions I think. I'll reorganise. Thank you for pointing that out! Jim
2 Nov 2024
Jim
SL Linear correlation
Thanks Autumn, well spotted - corrected now and on the answers
2 Nov 2024
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