Transition to university

heike hoffmann on Find the equation of a line through two points - zero gradient 3 weeks, 6 days ago

Gave some feedback: Ready to use

Christopher Graham on Extract common factors of polynomials 3 months, 2 weeks ago

The pattern match on line 10 of the custom function no longer appears to handle the commutativity of the expression, despite using the doCommute option. E.g. $2*(17x+2)$ is not acccepted, however $(17x+2)*2$ is.

Christopher Graham on Extract common factors of polynomials 3 months, 2 weeks ago

Saved a checkpoint:

Checkpointing before looking at the problem with the user defined function mark_factorised which no longer appears to be functioning correctly.

Christopher Graham on Extract common factors of polynomials 3 months, 2 weeks ago

Gave some feedback: Has some problems

Christopher Graham on Complete the square and find solutions 3 months, 3 weeks ago

Changed gaps to number entry, as they were not being marked correctly as mathematical expressions.

Parul Sharma on Complete a frequency table and find the measures of central tendency 4 months, 3 weeks ago

Gave some feedback: Ready to use

Mohini Chand on Using Laws for Addition and Subtraction of Logarithms 5 months, 2 weeks ago

Gave some feedback: Ready to use

Christopher Graham on Find the equation of a line through two points - positive gradient 5 months, 3 weeks ago

Fixed bug in correct line plot, caused by reading wrong student answer box (must have had a part added)

Christopher boyd on Find the equation of a line through two points - positive gradient 10 months, 4 weeks ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Find and use the formula for a geometric sequence 1 year ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Find and use the formula for a geometric sequence 1 year ago

Saved a checkpoint:

Looks like there was an off-by-one error.

Christian Lawson-Perfect on Solving linear simultaneous equations by elimination 1 year ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Solving linear simultaneous equations by elimination 1 year ago

Saved a checkpoint:

You're right! I've fixed it, and improved the TeX. Worried that I let that slip by!

Deirdre Casey on Find and use the formula for a geometric sequence 1 year, 1 month ago

In part b does not accept correct answer. Mistake also shown in the solutions.

Deirdre Casey on Find and use the formula for a geometric sequence 1 year, 1 month ago

Gave some feedback: Has some problems

Deirdre Casey on Solving linear simultaneous equations by elimination 1 year, 1 month ago

Gave some feedback: Has some problems

Deirdre Casey on Solving linear simultaneous equations by elimination 1 year, 1 month ago

I think there is a sign error in the second equation in part b.

Christian Lawson-Perfect on Substitute values into formulas 1 year, 1 month ago

Saved a checkpoint:

I've changed the definition of x2 to make sure the sales are always non-negative.

Christian Lawson-Perfect on Expand brackets and collect like terms 1 year, 1 month ago

Saved a checkpoint:

I've fixed part h - I was missing a plus-or-minus in the matching pattern.

J. Richard Snape on Substitute values into formulas 1 year, 2 months ago

Part (b) uses the random variable n={0..4}, but that can give negative sales in a year which doesn't make much sense.  I think that the variable definition has been copied over from a different word type question and should actually be allowed to run {2..5}