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 Forum Index >  Test Paper Related >  Primary 5 Matters
 P5 Maths SA2 2011 RGPS paper 1 Q15 & 23
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By: geniuskids (offline)  Sunday, October 14 2012 @ 08:48 AM CDT (Read 922 times)  
geniuskids

Hi there,
Just want to confirm if the answer from the answer sheet is wrong?

Q15 : Yazid and his classmates raced one another across a field. Midway through the race, 1/5 of Yazid's classmates was running in front of him and
7/9 of the total number of pupils in the class was running behind him. What was the total number of pupils in the class including Yazid?
(1) 35
(2) 36
(3) 38
(4) 45 My answer (4)
Answer Sheet ans (2)


Q23 : 8 girls take 3 days to paint a room. How many girls are required to paint the same room in 1 day?

Thanks

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By: echeewh (offline)  Sunday, October 14 2012 @ 07:24 PM CDT  
echeewh

Hey there,

Following pls find my worked solutions:

Q15.

(7/9) --> 4 p --> (28/36)
5p --> [(28/36) ÷ 4] × 5 = (35/36)
Hence, there are 35 pupils ahead and behind Y.
Total number of pupils (incl Y) = 35 + 1 = 36

========================

Q23

1 day - 8 g - (1/3) room
1 day - ? g - (3/3) room

? = 3 x 8 = 24 girls


=======================

Trust the above helps.

Do let me know again if there's further clarification.

Cheers,
Edward

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By: geniuskids (offline)  Friday, October 19 2012 @ 06:35 AM CDT  
geniuskids

Thanks Edward, you have been a great help!

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