Q&A - P5 Math

[PiggyLalala]

Essential:

Thanks but answer sheet showed 110 actually my DS also got 84 so not sure right or wrong?

Should be 84. Can always check.
2 numbers are 60 and 24.
1/3 of60 = 20
5/6 of 24 = 20.
Therefore 1/3 of A = 5/6 of B.

ALso their difference 60 - 24 = 36.
Therefore i think our answer is correct. 60 + 24 = 84

[tianzhu]

Superbugs:

Aitong SA2 P2 Q9


ABCD us a rectangle. It is divided into 4 unequal triangles P, Q, R and S which meet at a point as shown (sorry I am unable to draw the figure here). Find the area of triangle S.

Assume Meet point is H, Some other information:
Triangle ABH - 24cm
Triangle ADH - 51cm2
Triangle CHD - 45cm2
Both ABH and CHD shares the same base (breadth of rectangle)

Kindly assist. Tks

Hi

(45+24) - 51 ----- 18

Best wishes

[Superbugs]

CHIJ P5 2010 P2 Q15

There were 350 children enrolled in the Eliot Drama Academy in 2009. 2/7 of the children were girls. Additional children joined the drama academy in 2010. For every 2 girls who joined the drama academy, 1 boy joined the drama academy. If there was an equal number of boys and girls in 2010, how many boys joined the academy in that year?

My DD solution:
2009
Girls:2u
Boys: 5u
Total 350 children
7u=> 350
1u=> 50
2u=> 100 girls
5u=> 250 boys

2010
2G+1B = 3C
250-100=150
We got stuck here. Pls help

[MathIzzzFun]

Superbugs:

CHIJ P5 2010 P2 Q15

There were 350 children enrolled in the Eliot Drama Academy in 2009. 2/7 of the children were girls. Additional children joined the drama academy in 2010. For every 2 girls who joined the drama academy, 1 boy joined the drama academy. If there was an equal number of boys and girls in 2010, how many boys joined the academy in that year?

My DD solution:
2009
Girls:2u
Boys: 5u
Total 350 children
7u=> 350
1u=> 50
2u=> 100 girls
5u=> 250 boys

2010
2G+1B = 3C
250-100=150
We got stuck here. Pls help

Hi

In 2010, 2u of girls joined and 1u of boys joined.
number of girls = 100 + 2u
number of boys = 250+1u
Since number of boys = number of girls, 100 + 2u =250+1u
1u = 150

150 boys joined the drama academy in 2010.

cheers.

[Essential]

Hi need help. Please help me with this … In s school , 60 percent of the pupils are girls . 10 percent of the girls and 25 percent of the boys go to school by car . Wat percentage of the pupils of the puppy’s go to school by car? Pls show me the step. Thank u in advance

[peterch]

10 % out of 60% girls = 6%

25% out of 40% boys = 10%

So it should be 16% of the pupils go to school by car.

CMIIW

[Essential]

Thank u Peterch , very grateful

[Essential]

Any one here can help me with this…

Q16 from Ai Tong Paper
Agnes made some fruit pies. She gave some of them to her neighbour and collected $14.40 after selling 3/5 of the remaining pies for $1.20 each. She then had 1/5 of the original number of fruit pies left. How many fruit pies did she give her neighbour?

[MathIzzzFun]

Essential:

Any one here can help me with this....

Q16 from Ai Tong Paper
Agnes made some fruit pies. She gave some of them to her neighbour and collected $14.40 after selling 3/5 of the remaining pies for $1.20 each. She then had 1/5 of the original number of fruit pies left. How many fruit pies did she give her neighbour?

Hi

Total = number given to neighbour + number remaining

3/5 of number remaining = 14.40/1.20 = 12
number remaining = 12/3 x 5 = 20
2/5 of number remaining = 2/5 x 20 = 8 = 1/5 of total
Total = 5 x 8 = 40
Number given to neighbour = 40 - 20 = 20

cheers.

[Herbie]

Essential:

Any one here can help me with this....

Q16 from Ai Tong Paper
Agnes made some fruit pies. She gave some of them to her neighbour and collected $14.40 after selling 3/5 of the remaining pies for $1.20 each. She then had 1/5 of the original number of fruit pies left. How many fruit pies did she give her neighbour?

14.4/1.20= 12

Please draw model
3u =12
5u=20
2u=8

1/5 =8
5/5 =40

40-20=20
He gave away 20