12
Jun
2021

### Leaving Certificate Examination 2021 Mathematics Paper 1 Higher Level

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Hi all, I did Leaving Certificate Examination 2021 Mathematics Paper 1 Higher Level this weekend. So, it may not be 100% perfect but here is my attempt đŸ™‚ Also, I noticed the paper had very little choice even though it had “choice”, that is, it had a lot of Calculus in it, this I found... Read More

22
Apr
2021

### Formulae & Tables (Log Tables)

Hi everyone, here is a copy of the latestÂ Irish State Formula Book, it is English only and trimmed to the max đŸ™‚ Note: There is an error in the PDF, the power on the volume of a Sphere should be a 3 and not a 2. This was only a draft document and not the... Read More

12
Apr
2021

### Junior Cert (H) Maths — Income Tax

Junior Certificate Examination 2019 Mathematics Paper 1 Higher Level Question 4a Junior Certificate Examination 2018 Mathematics Paper 1 Higher Level Question 10 Junior Certificate Examination 2015 Mathematics Paper 1 Higher Level Question 3 Junior Certificate Examination 2014 Mathematics Paper 1 Higher Level Question 7 Junior Certificate Examination 2013 Mathematics Paper 1... Read More

9
Apr
2021

### Leaving Cert (H) Maths – Financial Maths

Leaving Certificate Examination 2020 Mathematics Paper 1 Higher Level Question 5 Leaving Certificate Examination 2017 Mathematics Paper 1 Higher Level Question 8 Leaving Certificate Examination 2015 Mathematics Paper 1 Higher Level Question 6 Leaving Certificate Examination 2013 Mathematics Paper 1 Higher Level Question 6 Latest PSI Licence: â€œContains Irish Public Sector Information... Read More

31
Jan
2021

### Factorising Quadratics

So, in this video I’m looking at speed-running the factorization of $4x^2 – 19x + 12$. Again, normal rules apply, basically I can only do what an exam student can do (e.g. use an approved calculator etc.). I do pre-program into my calculator the quadratic formula, this is something you are allowed to do for... Read More

30
Jan
2021

### What Happened to Question of the Day?

So, I’ve being trying to do an interesting question per day in the hope that others will find the solution interesting or useful. However, considering some of my videos have 0 views, it would seem the answer is a no đŸ™‚ So, rather than continuing putting more months of work into this instead I’ll look... Read More

16
Jan
2021

### Question of the Day

[Continues from yesterday] Formally test the equality of the long-run average values for the indices at the two sampling stations, using a significance level of $\alpha=0.05$. Calculate the 95 percent confidence interval for the difference between the long-run averages. Explain the relationship between the results of these two statistical analyses.

15
Jan
2021

### Question of the Day

In a study of the use of macroinvertebrate communities as pollution indicators, the effectiveness of a numerical species diversity index to indicate aquatic degradation due to acid mine drainage was investigated. A high diversity index should indicate an unstressed aquatic system. Two sampling stations were chose, one upstream and one downstream of the discharge point.... Read More

14
Jan
2021

### Question of the Day

A large dairy cooperative has three lines for packaging blocks of cheese. The packaging equipment is subject to random faults in that, on average, line A fails to stamp the sell-by date on label 1 in 200 times; the corresponding figures for lines B and C are 1 in 100 and 1 in 50. Of... Read More

13
Jan
2021

### Question of the Day

Babies with a particular congenital disorder are born in a large maternity hospital at a rate of two per four-week accounting period (FWAP). In any given FWAP what is the probability that more than three babies with this condition will be born in the hospital?