Mathematics: Post your doubts here!

[maha atif]

why did not we minus 0.05 from 0.3 liters

plz need help today tomorrow is my mock exam


markscheem answer : 70
paper 21 winter 2012 0580
View attachment 51557


plz anyone help me out have no time


your explanation meen to me alot

25-0.5=24.5 , 25+0.5=25.5
0.3-0.05=0.25 , 0.3+0.05=0.35
24.5/0.25=98
24.5/0.35=70
25.5/0.25=102
25.5/0.35=72.86
the lowest is 70 so it is the answer
at times u have to calculate all and look for the lowest.
hope it helps. Cheers!

 

[Saad the Paki]

Remember these rules

 

[Saad the Paki]

Since we need the lower bound.. we divide the lower bound by the upper bound

 

[Saad the Paki]

Thats why we didnt subtract .05 frm .3.. we added it to find the upper bound.. so 24.5(lower bound) ÷ .35(upper bound)

 

[Saad the Paki]

ur welcome, its ok even i hate sequences.... yes u can use the same method . btw are these from past papers?
and if u get any information about ict practical p2 and p3 , variant 22 and 32 plsssss do let me know . i have it on 23 and 27 april

Yeah these are frm the older papers... unfortunately i have the practical exams on 23rd and 27th too..! :/ #sedlyf

 

[AnonymousX9]

Is Casio FX991-ES PLUS allowed in the IGCSE Math 0580 exams? :/

 

[Saad the Paki]

Is Casio FX991-ES PLUS allowed in the IGCSE Math 0580 exams? :/

Yes... In fact it is the recommended calcultor..!

 

[masterex567]

Is Casio FX991-ES PLUS allowed in the IGCSE Math 0580 exams? :/

Any as long as it's not graphical, or ability to be programmed. Should be fine.

 

[Saad the Paki]

Guys pliz help me with this..!
How can ECD be 120?
Any working shown would be appreciated.!

 

[ahmadumar]

Guys pliz help me with this..!
How can ECD be 120?
Any working shown would be appreciated.!

omg this. i think its the 4th or 5th time ill be doing this question, still find it hard. Will do it soon on a piece of paper and will let u know.

 

[Saad the Paki]

omg this. i think its the 4th or 5th time ill be doing this question, still find it hard. Will do it soon on a piece of paper and will let u know.

Hahaha..! Ok fine .. good luck in solving it..!

 

[Saad the Paki]

omg this. i think its the 4th or 5th time ill be doing this question, still find it hard. Will do it soon on a piece of paper and will let u know.

This is from the examiner's report.. it might help..
" The candidate needed to extend the two sides to form a quadrilateral containing 90°, 90° and 60°, or alternatively, they could draw the internal equilateral triangle with a vertex at C, giving 90°, 90° and 60° again making the reflex angle DCE = 240° "

 

[Prince MMR]

Hey saad if you didn't get the answer for question ECD=120, I can help you out.

 

[Prince MMR]

Its actually easy but you should know Each exterior angle formula which is 360÷n(number of sides but in this question number of triangles).draw two more triangles with vertex c so total 3 triangles then divide360÷3 and you will get 120.

 

[ahmadumar]

Hey saad if you didn't get the answer for question ECD=120, I can help you out.

yes he didnt get the answer. help him by writing on a paper posting the pic

 

[ahmadumar]

Hahaha..! Ok fine .. good luck in solving it..!

this is how did it. save it and zoom it and increase brightness to view lol

 

[Saad the Paki]

this is how did it. save it and zoom it and increase brightness to view lol

Ooohh okay.. I get it now..!
Thanks a lot.!

 

[NOneed2speedd]

Can someone plz explain how to solve this questions. . M/j/14 v.42 Q.11

 

[Abdurrahmanmuhammed]

can somebody give me cie o level math past papers before the year 2002 pleeeease ?

 

[Mr.Physics]

can somebody give me cie o level math past papers before the year 2002 pleeeease ?

First you should clarify that whether you need past papers of OLEVEL MATHEMATICS or IGCSE mathematics coz this is the IGCSE thread !!