Tutor MathsGuru: Ask me for your burning Maths questions!

[YANNG]

I am looking for a good Math home tutor near Tampines to coach my daughter who is in P5 this year. Anyone with good contact ?

[babyluvv]

Hi, please help with the questions below!! Thanks in advance!!


1) Mr Tan had some charity tickets. If he sends 4 tickets each to some companies, he will need 20 more tickets. However, if he send 3 tickets each to the same companies, he will have a remaindee of 50 tickets. How many tickets does he have?

2) Jimmy & Kelly had some cards. In a game, Jimmy lost 1/10 of his cards to Kelly. After Jimmy lost his cards to Kelly, the ratio of the number of cards Jimmy had to the numbers of cards Kelly had was 3:1. The next day, after Jimmy lost more cards to Kelly, the ratio became 4:7 and Kelly had 72 more cards than Jimmy.
a) What was the ratio of the number of cards Jimmy had to the number of cards Kelly had at first?
b) How many cards did Kelly win from Jimmy altogether?

3) Alex, Boon Kheong & Casmuri paid for a meal. Alex paid 1/5 of the amount to Boon Kheong & Casmuri paid altogether. Boon Kheong paid 1/4 of the amount Alex & Casmuri paid.
a) What fraction of the total cost of the meal did Casmuri pay?
b) if the meal cost $205.20, how much did Alex pay?

Thanks!!!

[jieheng]

Hi babyluvv ,


Answers are on Q&A - PSLE - Math , page 281

[mnjkr123]

Hi!


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[rain29]

Hi,


Can anyone help me with the following P5 Maths questions. Thanks in advance.

Q1. At a concert, the number of men is 4/7 of the number of women. There are 440 adults altogether. How many women are there at the concert?

Q2. The number of children spectators at the Judo competition is 4/5 of the number of adults. There are 120 more adults than children. The number of boys is 4 times the number of girls. What is the total number of boys watching the competition?

Q3. 1/2 of Joshua’s savings is equal to 4/5 of Megan’s savings. The difference between their savings is $15. What is Megan’s total savings?

Q4. The number of men at a gathing was 3/5 that of women and children. The number of children was 1/3 that of men. If there were 15 children present, how many women were at the gathering?

[pixiedust]

[] represents squares/rectangles in model.

Alignment is slightly off.


Q1. At a concert, the number of men is 4/7 of the number of women. There are 440 adults altogether. How many women are there at the concert?

M [][][][]
W [][][][][][][]

11U->440
7U->280

Ans: There are 280 women.

Q2. The number of children spectators at the Judo competition is 4/5 of the number of adults. There are 120 more adults than children. The number of boys is 4 times the number of girls. What is the total number of boys watching the competition?

C [][][][]
A [][][][][]

1U->120
There are 480 children.

4/5*480=384

Ans: There are 384 boys.

Q3. 1/2 of Joshua's savings is equal to 4/5 of Megan's savings. The difference between their savings is $15. What is Megan's total savings?


J [........][........]
M [][][][][]

This means Joshua's savings is 8u
Difference in savings : 8u-5u=3u

3u->$15
5u->$25

Megan's total savings : $25

Q4. The number of men at a gathing was 3/5 that of women and children. The number of children was 1/3 that of men. If there were 15 children present, how many women were at the gathering?

M [][][]
W+C [][][][][]
-->
C []
W [][][][]

U->15
4U->60

Ans: There were 60 women.

check :
Children : 15
Women : 60
total 75

3/5 of 75=45
hence Men : 45

1/3 of 45 = 15 = number of children, ok

[wkong]

Hi,


Need help for the following:

Lily is meeting a friend at a certain time. If she drives at 80km/h, she will be 1/3hr late. If she drives at 60km/h, she will be 3/4hr late. How long will the journey take if she travelled at 90km/h?

Thanks,
wkong

[jieheng]

wkong:

Hi,


Need help for the following:

Lily is meeting a friend at a certain time. If she drives at 80km/h, she will be 1/3hr late. If she drives at 60km/h, she will be 3/4hr late. How long will the journey take if she travelled at 90km/h?

Thanks,
wkong

Hi ,

Speed = Distance / Time taken

Time taken to complete the journey at 80 km/h : Time taken to complete
the journey at 60 km/h = 60 : 80 = 3 : 4

Difference in time taken = 3/4 h - 1/3 h
(4 - 3 ) unit = 9/12 h - 4/12 h
1 unit = 5/12 h

Time taken to complete the journey at 80 km/h = 3 units = 3 * 5/12 = 5/4 h

Distance between the journey = 5/4 * 80 = 100 km

Time taken to complete the journey at 90 km/h = 100 / 90 = 10/9 h = 1 1/9 h (Ans)

[wkong]

jieheng:

Hi ,


Speed = Distance / Time taken

Time taken to complete the journey at 80 km/h : Time taken to complete
the journey at 60 km/h = 60 : 80 = 3 : 4

Difference in time taken = 3/4 h - 1/3 h
(4 - 3 ) unit = 9/12 h - 4/12 h
1 unit = 5/12 h

Time taken to complete the journey at 80 km/h = 3 units = 3 * 5/12 = 5/4 h

Distance between the journey = 5/4 * 80 = 100 km

Time taken to complete the journey at 90 km/h = 100 / 90 = 10/9 h = 1 1/9 h (Ans)

Thank you

[jieheng]

Hi wkong ,


You are welcome .