Q&A - P5 Math

[MathIzzzFun]

concerned1970:

Need help on several ques! Ty in advance.


4) A ball of yam 6/10m is cut into 3 pieces of the same length. What is the length of each piece? Is the ans 1/5?

hi

hi

6/10m divide by 3 = 2/10 = 1/5 m

cheers.

[MathIzzzFun]

concerned1970:

Need help on several ques! Ty in advance.



5) At a train station, 3/4 of the commuters were men and the rest were women and children. The number of children was 1/3 the number of women. There were 150 women. How many men were there?

Hi
women : children = 3 : 1 --> total number of children + women = 150/3 x 4 = 200
men : women + children = 3 : 1
men --> 3 x 200 = 600

cheers.

[tianzhu]

concerned1970:

tianzhu:

[quote=\"S6169\"]
Sorry, a bit confuse here,
\"Each piece cut from Rope Q was 2/5 longer than each piece cut from Rope P\", 2/5 is fraction or refer to 2/5 m?
If it refer to the fraction, then should be 2*(1+2/5)=2.8m

Hi

Thank you for pointing out the error.

It should be 2/5 (fraction) not 2.5m

2.8 m is the correct answer.

Best wishes

Hi!

So sry just realized that I'd made a mistake. It's 2/5m longer. So what should be the correct answer?[/quote]Hi

Good Morning.

If it is 2/5 m longer, then the original answer is correct.

2/5 ----- 0.4

0.4*3 ------ 1.2

2 + 1.2 ------ 3.2

Rope Q ------ 3.2m

Best wishes

[MathIzzzFun]

concerned1970:

Need help on several ques! Ty in advance.


6) There were a total of 198 vehicles in a three-storey car park. An hour later, 34 more vehicles were parked on the first storey of the car park and half of the vehicles on the second storey left. Then, there were an equal number of vehicles on each of the three storeys. A) How many vehicles were there on the third storey? B) How many more cars were there on the second storey than on the first storey at first?

Q6
In the end, number of cars on each storey --> 1 unit
At first :
1st storey --> 1 unit - 34
2nd storey --> 2 units
3rd storey --> 1 unit
Total --> 4 units - 34 = 198
1 unit --> 58

3rd storey --> 58
2nd storey --> 116
1st storey --> 24
116 - 24 = 92 more cars on 2nd storey than first.

cheers.

[MathIzzzFun]

concerned1970:

Sry still got few more ques.


1) Sophia bought an equal number of oranges and pears for a party. The oranges were bought at 7 for $2 and the pears were bought at 5 for $3. She paid $33 more for the pears than for the oranges. A) How much did Sophia pay in all? B) How many oranges and pears did she buy altogether?

2) May and Tom had an equal number of sweets. Each day, May ate 12 sweets and Tom ate 6 more than her. When Tom had 24 sweets left, May had 96 sweets
left. How many sweets did each of them have at first?

3) Ray and Tim had the same amount of pocket money. Each day, Ray spent $4 and Tim spent $6. When Tim had $12 left, Ray had 4 times as much money left as Tim. How much was each boy's pocket money at first?

Pls do not use algebra to solve the pb sums. Ty in adv.

Q1.
35 oranges --> $2 x 5 = $10
35 pears --> $3 x 7 = $21
$21-$10 = $11
$33/$11 = 3

number of oranges bought = number of pears bought = 3 x 35 = 105
Total number of oranges + pears = 2 x 105 = 210
total amount paid = 3 x 10 + 3 x 21 = $93

cheers.

[MathIzzzFun]

concerned1970:

Sry still got few more ques.


1) Sophia bought an equal number of oranges and pears for a party. The oranges were bought at 7 for $2 and the pears were bought at 5 for $3. She paid $33 more for the pears than for the oranges. A) How much did Sophia pay in all? B) How many oranges and pears did she buy altogether?

2) May and Tom had an equal number of sweets. Each day, May ate 12 sweets and Tom ate 6 more than her. When Tom had 24 sweets left, May had 96 sweets
left. How many sweets did each of them have at first?

3) Ray and Tim had the same amount of pocket money. Each day, Ray spent $4 and Tim spent $6. When Tim had $12 left, Ray had 4 times as much money left as Tim. How much was each boy's pocket money at first?

Pls do not use algebra to solve the pb sums. Ty in adv.

Q2.
May will have 6 more sweets than Tom each day.
96 - 24 = 72
72 / 6 = 12 --> May had 96 sweets left after 12 days.
Number of sweets each had at first = 12 x 12 + 96 = 240

Q3 is similar to Q2.
Ray had 4 times as much left as Tim --> Ray had 3 times more than Tim = 3 x $ 12 = $36
Each day, Ray will have $6 - $4 = $2 more than Tim
$36 / $ 2 = 18 days
At first, each boy had 18 x 6 + 12 = $ 120

cheers.

[concerned1970]

MathIzzzFun:

concerned1970:

Need help on several ques! Ty in advance.



3) Find the height of a triangle given that its area is 48cm2 and its base is 12 cm.

Hi

area of triangle = 1/2 x base x height... you can work out the height from here.

cheers.

Tysm for yr help. I know the formula but don't know the exact workings. Pls elaborate.

[MathIzzzFun]

concerned1970:

MathIzzzFun:

[quote=\"concerned1970\"]Need help on several ques! Ty in advance.



3) Find the height of a triangle given that its area is 48cm2 and its base is 12 cm.

Hi

area of triangle = 1/2 x base x height... you can work out the height from here.

cheers.

Tysm for yr help. I know the formula but don't know the exact workings. Pls elaborate.[/quote]48 = 1/2 x 12 x height
height = 48/6 = 8 cm

cheers.

[concerned1970]

48 = 1/2 x 12 x height

height = 48/6 = 8 cm

cheers.[/quote]

Ty for yr help

[concerned1970]

HI. Need help on following ques.


1) Mrs Tan required 3/4 kg of flour to make 96 cookies. If she had only 5/8 of the flour. How many cookies could she make?

2) 1/4 of the pizza was given to David and 2/9 of the remainder was given to Joe. The rest was then distributed equally among 7 boys. What fraction of the pizza did each boy receive?

3) On a bus, there were 32 more females than males. At a particular bus stop, 12 females alighted from the bus and 4 males boarded the bus. There were twice as many females as males in the end.
a) What was the total number of males at the bus stop? b) How many females were there on the bus at first?

4) Gina and Mike had same amount of money. After Gina gave $42 to Mike, Mike had twice as much money as Gina. How much money did Mike have in the end?