Tutor MathsGuru: Ask me for your burning Maths questions!

[Herbie]

Hi I have one qn


Town A and Town B were 240km apart. Sharon left Town A for Town B at 9am travelling at an average speed of 80km/h. Kim left Town A sometime later than Sharon and overtook her at 11am. Kim’s travelling speed was 90km/h

a. at what time did kim leave town A.

b. How much later did sharon arrive in Town B than Kim?

Tx

[CJM]

Harry painted 1/4 of a pole red and 1 2/3m of the pole blue. The rest of the pole was not painted. If the pole is 6m long, what was the length of the pole that was not painted.

[CJM]

Joseph has fewer than 60 cookies.

If he puts them into bags of 5 cookies, he will have 2 cookies left.
If he puts them into bags of 7 cookies, he will be short of 3 cookies.
How many cookies does he have ?

[Vanilla Cake]

CJM:

Harry painted 1/4 of a pole red and 1 2/3m of the pole blue. The rest of the pole was not painted. If the pole is 6m long, what was the length of the pole that was not painted.

3/4x6=4½
4½-1⅔=2⅚
Length of the pole that was not painted =2⅚m

CJM:

Joseph has fewer than 60 cookies.
If he puts them into bags of 5 cookies, he will have 2 cookies left.
If he puts them into bags of 7 cookies, he will be short of 3 cookies.
How many cookies does he have ?

5+2=7
7, 12, 17, 22, 27, 32
7-3=4
4, 11, 18, 25, 32
Number of cookies that Joseph has = 32

[CJM]

thank you, vanilla cake !

[Hifive]

Hi everyone


Need help on the following questions:

1) A class was fixing a puzzle of their photos. In the first hour, the ratio of the number of fixed pieces to unfixed pieces is 1:5. In the next hour, they fixed another 15 pieces of the puzzle. Finally, the number of fixed pieces became 60% of the unfixed pieces. How many pieces were there in the puzzle?


2) A piggy bank had some 20-cent and 50-cent coins. 2/3 of the number of 20-cent coins is equal to 5/6 of the number of 50-cent coins. If there is a total of 162 coins, find the total value of all the coins in the piggy bank.

Source : Catholic High SA2 2009 P5

Thanks in advance.

[Brenda10]

Hifive:

Hi everyone


Need help on the following questions:

2) A piggy bank had some 20-cent and 50-cent coins. 2/3 of the number of 20-cent coins is equal to 5/6 of the number of 50-cent coins. If there is a total of 162 coins, find the total value of all the coins in the piggy bank.

Source : Catholic High SA2 2009 P5

Thanks in advance.

Hi, This is Q16. DD working:

2/3 = 5/6

10/15 = 10/12 (Make it equal)

15 + 12 = 27

162 / 27 = 6

15 * 6 = 90 (# of 20 cents coins)
12 * 6 = 72 (# of 50 cents coins)

90 * 0.2 + 72 * 0.5 = $54

Thank you.

[Vanilla Cake]

Hifive:

1) A class was fixing a puzzle of their photos. In the first hour, the ratio of the number of fixed pieces to unfixed pieces is 1:5. In the next hour, they fixed another 15 pieces of the puzzle. Finally, the number of fixed pieces became 60% of the unfixed pieces. How many pieces were there in the puzzle?

This question is from Catholic High School (Primary) 2009 P5 SA2 Paper 2 Q10 [3 marks]

DD2's workings
Before
F : UF
1 : 5
4 : 20

After
F : UF
3 : 5
9 : 15

5u=15
24u=72

Number of pieces in the puzzle was 72

VC's mum

[Brenda10]

Hifive:

Hi everyone


Need help on the following questions:

1) A class was fixing a puzzle of their photos. In the first hour, the ratio of the number of fixed pieces to unfixed pieces is 1:5. In the next hour, they fixed another 15 pieces of the puzzle. Finally, the number of fixed pieces became 60% of the unfixed pieces. How many pieces were there in the puzzle?


Source : Catholic High SA2 2009 P5

Thanks in advance.

Working:
60/100 = 3/5


At First
Fixed unfixed
1 5
x8 x8
8 40

At End
Fixed Unfixed
3 5
x6 x6
18 30

18 - 8 = 10 units and 40 - 30 = 10 units


10 units = 15
1 unit = 1.5
48 units = 48 x 1.5 = 72

Thank you.

[corvette]

Mrs Gopal and Mrs Ari went to the supermarket. Both women decided to spend all their money on either apples or pears and they would not buy the same fruit.

If Mrs Gopal bought only pears, she would have 9 more fruit than Mrs Ari.
If she bought only apples, she would have 41 more fruit than Mrs Ari.
How much more money has Mrs Gopal than Mrs Ari? Each apple cost 40 cents and each pear cost 60 cents.

Anyone can better explain this question without using algebra? Thank you very much. :?: