Monday, October 8, 2012

S16 Supplement

Solve this question.

Fred has $60 and George has $40 in their bank account. Everyday, Fred deposits $5 while George deposits $9.

(a)    How long does it take for Fred and George to have the same amount of money in their account?
(b)    How many days will George need to save in order to have $40 more than Fred?
 
Discuss with your friend how you have derived your answers.
Have fun!
Mrs R

17 comments:

  1. I think we need to use multiplication.

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  2. I found one of the answers only. The listing is too long!

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  3. I got both of my answers.I found my answer for (b) without listing.It is actually not needed.I will explain to you how to do it tomorrow in school.

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  4. I have both answers. Actually I did not use listing but I used number statements. Well, I did my method on my whiteboard(as I am a visual person).

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  5. Can we post our answers yet????

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  6. U don't need to list, I've got both answers in 1 minute.

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  7. I used number statements and got both answers easily.

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  8. I've got the answer for (b)but I can't find the answer for (a) without listing. Can someone teach me?

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    Replies
    1. U take 60 to minus 40, which u get 20.And then, find the common multiple of 5 and 9.Then, u use the common multiple to minus 20.Finally, u use the answer to divied by 5, and TADA!U get the answer!

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    2. George-$9
      Fred-$5
      Difference: $4

      George-$40
      Fred-$60
      Difference: $20

      $20/$4=$5
      Ans: $5

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    3. Sabarna I used the same method as u!Ur answer is correct!!!

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    4. Sabarna,I think it should b 5 days,not 5 $.

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    5. Oh yes! Thank You!

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