Qualification > Math
IGCSE MATHS DOUBTS HERE !!!!
Galleria:
ohhhhhhhhhh lol
now i get it
i kept getting the answer 480 . now i get that we gotta go below too . THANKS !
elemis:
--- Quote from: Galleria on October 16, 2010, 05:18:36 am ---ohhhhhhhhhh lol
now i get it
i kept getting the answer 480 . now i get that we gotta go below too . THANKS !
--- End quote ---
No worries ;)
WARRIOR:
--- Quote from: Deadly_king on October 15, 2010, 06:04:59 pm ---You made a little mistake there dude. It actually is similar to a general progression ;)
The required solution :
6000 x 1.11(n-1) = 3(6000)
Simplify it and you'll be getting n = 11.5 which can be taken as 12. But the best answer is 11.5
Same principle is applied for question 3 and 1.
3) 2 x 1.21(n-1) = 20
You just need to simplify and you'll get n = 13
1) 100 X 1.1(n-1) = 2(100) -----> n = 8.27 which can be taken as 8 ;)
Hope it helps :)
--- End quote ---
i never heard the thing about the n-1 but it seems to get the right answers ! thx much !!
i have another question
A wallet contains $40 and has 3 times as many $1 notes as $5 notes . Find the no. of each kind.
Deadly_king:
--- Quote from: Kimo Jesus on October 20, 2010, 04:05:38 pm ---i never heard the thing about the n-1 but it seems to get the right answers ! thx much !!
i have another question
A wallet contains $40 and has 3 times as many $1 notes as $5 notes . Find the no. of each kind.
--- End quote ---
Anytime :)
Given the ratio of $3:$5 = 3:1(5) ---->$40 represents (3 + 1(5))=8 shares
Hence 1 share represents 40/8 = $5
Number of $1 = 3(5) = 15
Number of $5 = 5
Hope it helps :)
WARRIOR:
--- Quote from: Deadly_king on October 20, 2010, 04:18:33 pm ---Anytime :)
Given the ratio of $3:$5 = 3:1 ---->$40 represents (3 + 1)=4 shares
Hence 1 share represents 40/4 = $10
Number of $1 = 10
Number of $5 = 3(10) = 30
Hope it helps :)
--- End quote ---
tyvm + rep
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