Transition to university

Hannah Aldous on Finding the $n^{\text{th}}$ Term of a Quadratic Sequence 8 years, 6 months ago

Gave some feedback: Needs to be tested

Hannah Aldous on Find and use the formula for a geometric sequence 8 years, 6 months ago

Gave some feedback: Needs to be tested

Lauren Richards commented on Decimals to fractions 8 years, 6 months ago

Explanation for "Doesn't work":

The problems with this question are in part b) - part a) is mostly fine.

• In part a), I am slightly unhappy about it the apparent impossibility of aligning whilst having an underline. I have a subtraction in part a) and wanted the answer to the subtraction directly underneath the subtraction with an underline separating it but I couldn't get it to work so I now have it not underlined and separated but still aligned. 
• The big problems are in both sections of part b). 
• b)i) - The unsimplified fraction does not simplify properly using either gcd or the \simplify command and I cannot for the life of me work out why not. Vicky previously thought the problem was that the numerator and denominator of the fraction were not variables but I have made them so and it still will not 1) identify the correct gcd nor 2) simplify properly. For instance, on the last run it said that with a fraction of 700/1000, 700 and 1000 had a gcd of 1 and therefore the fraction could not be simplified. It's very strange though, sometimes it works and sometimes it doesn't. It is therefore difficult to set the correct answer as there is no predicting which answer itself has calculated. 
• b)ii) - I have had to create a number using individual variables which is causing problems, e.g. variable a = 1, variable b = 2, variable c = 3 and the full number = 123. Everything is fine up until the end where there is a fraction that needs to be simplified where 123 is the numerator. Numbas obviously won't recognise (1)(2)(3) as 123 so I don't know how to get around this. I could ask the students to just not simplify their answer which gets rid of the problem but Vicky and I both agree that is not best practice. 

Bradley Bush on Extract common factors of polynomials 8 years, 6 months ago

Gave some feedback: Needs to be tested

Bradley Bush on Using a speed graph to find distance 8 years, 6 months ago

Gave some feedback: Needs to be tested

Lauren Richards on Decimals to fractions 8 years, 6 months ago

Gave some feedback: Doesn't work

Lauren Richards commented on Decimals to fractions 8 years, 6 months ago

Vicky had a look at this question but it is still problematic. 

Bradley Bush commented on Using a speed and acceleration graph 8 years, 6 months ago

Thank you for the feedback, I have acted on this by splitting the question in half and adding a part e) onto the end of this question. I have also moved the axis to make the graph easier to understand.

Bradley Bush on Using a speed and acceleration graph 8 years, 6 months ago

Gave some feedback: Needs to be tested

Lauren Richards commented on Decimals to fractions 8 years, 6 months ago

Having a few issues with this question and need a bit of help. 

Vicky Hall on Probability - Notation and Conversion between Percentages, Decimals and Fractions 8 years, 6 months ago

Gave some feedback: Has some problems

Vicky Hall commented on Probability - Notation and Conversion between Percentages, Decimals and Fractions 8 years, 6 months ago

In part a)i), you need to untick the box in the marking section that says 'require trailing zeroes'. I just entered $0.4$ instead of $0.40$ and it marked it wrong. I would put a full stop at the end of all sentences such as 'Convert this probability to a decimal'.

Vicky Hall on Use the quadratic formula to solve an equation in terms of an unknown variable 8 years, 6 months ago

Gave some feedback: Has some problems

Vicky Hall commented on Use the quadratic formula to solve an equation in terms of an unknown variable 8 years, 6 months ago

This is a well conceived question but the answers look a bit nasty! It would be a much nicer question if, when we get to the point of having $\sqrt(xk^2)$, the $x$ is a square number. That way we end up with some quantity of $k$ divided by $2$, which may or may not simplify, but it looks a lot better than having a surd or a decimal. 

Stanislav Duris commented on Cumulative percent decrease 8 years, 6 months ago

I've reworded the statement. I've also made all numbers display in LaTeX, but I am unsure about this, because I have been previously told not to do this for all numbers in text. How do we decide which numbers/variables to put in Latex and which ones to keep as text?

Stanislav Duris on Cumulative percent decrease 8 years, 6 months ago

Gave some feedback: Needs to be tested

Vicky Hall on Using the Quadratic Formula to Solve Equations of the Form $ax^2 +bx+c=0$ 8 years, 6 months ago

Gave some feedback: Has some problems