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  1. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    btwi just remembered,would they ever ask us to find the volume of a circle.....i knwo the volume of sphere thing but just normal circle like we find area then multiply it with length or somehting
  2. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    oh okay so i attached my working of the sn thing so far but idk how to continue
  3. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    OooO ok for the next step of http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w08_qp_4.pdf q.10 b ii i did 100(100+1) but its wrong :( idk how im supposed to think !!
  4. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    l last question Q.9 D
  5. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w08_ms_4.pdf q/10 b i)please if you dont mind I did 2(1+2+3+4....)=2n(2n+1)/2 and simplified to get n(2n+1) not n (n+1):/
  6. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    oh okay thanks,this is a similar question http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w10_qp_41.pdf but only last d is the problem,what i did was 4-1 = 1/2 x 2 (2+1) 3=3 but the answer is for 3 marks so thats it or do i have to shwo them in a different way
  7. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    hm so if any term in this sequence is equal to the term before it plus two times the term two before it.....so for first three terms its 2, 3, 7,.......if we want to find 3rd term it would be 3+(2*3) which is not equal to 7..?how?
  8. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    w why are you putting 2 infront of 400 in the calculation part..i understand that 2(1+2+3+....400)but wouldnt even numbers mean that there are only 400 digits and not 800?so why not 400(400+1)/2
  9. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    and q.11 part (iv) and (v) for summer 2011 paper 43..
  10. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w11_qp_43.pdf q.12 b iii
  11. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    ohhhhhhhhhhhhh thank youuuuuuuuu
  12. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    so the question that would require me to choose points from center and NOT from boundary line is when the inequality is a dashed line and the question that would require me to try all points on center plus the ones on boundary is when the inequality is equal to or greater than(solid line)...
  13. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    yes its not on the boundary line that was my confusion,we always take points that are only in the boundary line(if solid lines are there)right?and never include ones in the center that are not on boundary.....?and if there was a dashed line then the ones on boundary would not be included for...
  14. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    oh so if it was a solid line you would actually consider points like (9,5) right?
  15. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    btw do you try the points on the edge of unshaded area or all the points in the unshaded area including ones like in the centre?
  16. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    thank you i really appreciated!!,do you like work with IGCSE exam board or something lol we might as well start paying you :p
  17. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    Q.10d i and ii,we have to draw that,which I did,and I have attached the picture of what I drew which i checked more than once here,now for finding least cost of boxes,I know that method of substitu ting the points in the unshaded area with the 5x + 2y but do we have to choose and try EACH and...
  18. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    here:)
  19. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    alright thank you:) I have attached the inequality thing btw in a previous post,if its possible and if youre free,please do check it
  20. I

    I'm an IGCSE Maths Teacher - Post your questions here.

    in gradient using tangent method,how many decimal places/significant figures should the answer be?
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