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P6 Mathematics

Question post on Fri, 21/01/2022 8:27pm

Hi..need your kind help.

Thank you.

ChiefKiasu · Answer 1 · Post on Sat, 22/01/2022 9:38am

I can only do algebra. I’ll leave it to others to do the model answer.

Let B be the original number of boys in the camp.
Let G be the original number of girls in the camp.

(1) B = 2/3 * G

(2) 1/4 * B + 2/3 * G = 65

Substituting (1) into (2),
1/4 * B + B = 65
=> 5/4 * B = 65
Therefore B = 52

So, G = 3/2 * 52 = 78

So the total number of children in the camp at first = B + G = 52 + 78 = 130 #

Zeezee78 · Answer 2 · Post on Sat, 22/01/2022 11:47am

Zeezee78 Post on Sat, 22/01/2022 11:47am

Thank you so much! 🙏

anytimehomeworkcher · Answer 3 · Post on Sat, 22/01/2022 10:42am

Draw the model above based on the question. You have to divide each big block into half as shown by the dotted lines since 3/4 of the boys leave.

Rest of the working:

5 units —> 65

1 unit —> 65 / 5 = 13

10 units —> 130

There were 130 students at first.

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anytimehomeworkcher · Answer 4 · Post on Sat, 22/01/2022 10:42am