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 pri6 maths
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By: shino.dino (offline)  Sunday, June 22 2014 @ 11:02 AM CDT (Read 661 times)  
shino.dino

hi, I need help. pri6 maths. thanks

Betty has 0.2 as many stickers as Carol. Carol has 1.25 as many stickers as Diana. Carol gives 9 stickers to Diana. Then Carol and Diana have an equal number of stickers each. Find the number of stickers Betty has.

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By: echeewh (offline)  Sunday, June 22 2014 @ 08:09 PM CDT  
echeewh

hey <shino.dino >

Appreciate that you post the Answerkey if its available. Smile

Following is my worked solution :

*** - for alignment purpose

0.2 = 2/10 = 1/5
1.25 = 125/100 = 5/4

in ratio form, we have ...

B : C : D
1 : 5
*** 5 : 4
__________
1 : 5 : 4

in order for C to give 9 stickers to D and then both C and D have equal number of stickers thereafter, C will give away (1/2)u of her stickers {since C has 1u of stickers more than D}.

Hence,

(1/2)u --> 9
1u --> 2 × 9 = 18

B = 1u --> 18

=========

Trust this helps.

Do let me know again if there's further clarifications or if this is different from your <Answerkey>.

Cheers,
Edward

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By: shino.dino (offline)  Sunday, June 22 2014 @ 09:14 PM CDT  
shino.dino

answer is 18.
thank you so much

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