Maths problem.. please help

scottishlass

Broke_Student wrote: »

I thought the 8:1 would be a molar ratio and to work out the ratio of mass you would have to multiply the molar ratios by the relative atomic masses of the respective elements. Thats what I tried to work out anyway. The question isn't clear about what the 8:1 means (mass or moles).

Maybe you do, I just took it to be a straight ratio question - although not sure what level its at - was guessing GCSE start of A Levels but I may be wrong.

devilgirls1

its a GCSE equiv test for a PGCE course.. have a D in maths and because of dad's illness never managed to finish off course in college..

i have a level 2 in key skills- application of number and have been told it is the equiv of a gcse grade c, does anyone know if this is true??

scottishlass

All I nkow is an application of number level 2 is worth 10 ucas points.

I would assume if you got a C in GCSE maths then you could get a level 2 in application of number (not sure if its vice versa though i.e if one of them is harder etc)

joshm_2

bristol_pilot wrote: »

8a is impossible as-written. The question does not state that the triangle contains a right angle.
I suspect that it means a right-angled triangle of sides 3, 4 and 5.
Whoever set this test needs to go on a course themselves (on quality control in setting exams).

A 3-4-5 triangle is right-angled by definition. The question is valid.

joshm_2

bristol_pilot wrote: »

Question 6 is also nonsense. If the ratio of copper:tin is 8:1 and the total weight of the nail is 18g, then it must contain 16g copper and 2g tin.

How can the total weight or the tin content of the same nail be different in the second part of the question? Maybe they mean another nail made of the same material, but that's not what it says.

The examiner should go back to school!

There is no stated relation between the nails specified in a) and b). Otherwise, the examiner would be giving the answer to part a when he/she asked part b.