12.5 minutes for the 25 mark questions.
I was told by my maths teacher to half the marks and that's your time
e.g. 50 mark Q should take about 25 minutes
this is for ordinary level not sure if its the same for higher level
Id say just stick to what it recommends on the paper, that always works out for me but if there is something you find easier spend less time on it and use the time saved for something more difficult. 💕