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Tuesday, May 23 2017 @ 12:07 AM CDT
 Forum Index >  Test Paper Related >  Primary 4 Matters
 Maths(2 sums)
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By: achieve_goal (offline)  Tuesday, November 01 2011 @ 08:33 AM CDT (Read 1100 times)  
achieve_goal

1. The mass of a crate of oranges is 3/4

the mass of a crate of pears. The mass of

a crate of lemons is 1 1/2 times the mass of the

crate of pears. The crate of lemons is heavier

than the crate of oranges by 15 kg. What

is the mass of the crate of pears?

2. The number of pupils in a school

is 186. 2/3 of the number of girls is equal to

3/11 of the number of boys. How many more

boys than girls are there in the school?

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By: GIM (offline)  Tuesday, November 01 2011 @ 11:17 PM CDT  
GIM

Question1.
Orange ----- 3 units
Pear --------- 4 units
Lemon ------ 1.5 x 4 = 6 units

Difference between lemon and orange,
6 units - 3 units = 3 units
3 unis -------- 15 pcs
1 unit --------- 15 / 3 = 5 pcs
pear 4 units ----- 5 x 4 = 20 pcs (answer)

Question 2
2 units of girls = 3 units of boys
1 unit of girl = 1.5 unit of boys

Convert 3 units of girls in terms of unit of boys

Total Girls ----- 3 units of girls x 1.5 = 4.5 units of boys
Total Boys -----11 units of boys
Difference ------ 11 - 4.5 =6.5 units
Total boys + girls = 4.5 + 11 = 15.5 units

15.5 units ------- 186
1 unit ------------- 186 / 15.5 =12
difference ------- 6.5 units x 12 =78 pupils ( answer)

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