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Hi,

Manage to get the solution for Q4,pls let me know if there is a faster way to do it.

Solution:
----------
If Jason and Keven spent $100 and $50 each day respectively,
Equation 1
------------
J - (100 * number of days) = 1300
K - (50 * number of days) = 0

If Jason and Kevin spent $50 and $100 each day respectively,
Equation 2
------------
K - (100 * number of days * 1/2 )= 0
(inorder to get $0, the days have to be shorter by ½ as he spent twice the amount)
J - (50 * number of days * 1/2 ) = 3700
Therefore,
J – ( 25 * number of days) = 3700

Compare with Equation 1
----------------------------
J - (100 * number of days) = 1300
75 * number of days = 2400
Number of days = 2400 / 75 = 32
J = 1300 + 100 * 32 = $4500

Hi all,

Thanks for helping.
I need help to solve the following questions:

Q 1) Some pupils from 5K, 5L and 5M took part in a Social Studies quiz. 34 participants were from 5L and 5M. 21 participants were not from 5L and 19 participants were not from 5M. How many pupils from these 3 classes took part in the quiz? Model Answer: 37pupils

Q 2) Mrs Lee spent ½ of her money on some almond cookies and 2/5 of the remaining money on 6 slices of butter cake. Each slice of butter cake costs thrice as much as one almond cookie. How many almond cookies did she buy? Model Answer: 18 almond cookies.

Q3) Three sisters Lisa, Ming and Nora shared the cost of a present for their father. Lisa paid ¼ of the total share of Ming and Nora. Ming paid 1/9 of the total share of Lisa and Nora. Nora paid $60 more than Ming. How much did the present cost? Model Answer: $100

Q4) Jason and Kevin were given some money each. If Jason and Kevin spent $100 and $50 each day respectively. Jason would have $1300 when Kevin had spent all his money. If Jason and Kevin spent $50 and $100 each day respectively, Jason would have $3700 when Kevin had spent all his money. How much money was given to Jason at the beginning.
Model Answer: $4500

Pls help to solve the following questions, thanks in advance.


Qn 1)
There are some crystal and glass marbles in a pouch. If 3 crystal marbles are removed from the pouch, the number of crystal marbles left will be 1/6 of the glass marbles left. If 5 glass marbles are removed from the pouch, the number of crystal marbles left will be 1/4 of the glass marbles left. How many marbles are there in the pouch at first?
Model Answer: 62.5

Qn 2)
Grandma had some yellow and purple sweets in the ratio 9:7. On Monday, she made 54 more yellow sweets. On Tuesday, she gave away 44 purple sweets and sold 129 yellow sweets. The number of yellow sweets to the number of purple sweets became in the ratio of 6: 5. How many yellow sweets are there in the end?
Model Answer: 258

Qn3)
Mark’s current age is 1/4 of Ronald’s. In 24 years’ time, Ronald age will be 14 years less than twice Mark’s age. What is Ronald age now?
Model Answer: 20

Hi all,

Need help for the following question:
--------------------------------------------
There are a total of 28 chickens and cows in a farm. If the total number of cows’ legs is 40 more than the total number of chickens’ legs, find the number of
a) chickens in the farm (answer: 12)
b) cows in the farm (answer: 16)
Is it possible to get the answer without using ‘Guess & check’ method?
Thanks in advance.

Dear sakurachan and ksi,


Thank you very much.

Best regards,
chokos

Hi all:


Need help on following qn:
Jessica had $300 more than Pamela.
After Pamela spent $60, the amount of money she had left was 1/6 of
the amount of money Jessica had. How much money had Pamela at first?
(Ans: $132)

@ Tianzhu

Thank you very much.

P4 maths question:

Qn: The total mass of 9 one-dollar, fifty cent and twenty-cent coin is 52.47g.
How many of each type of coins are there?
( $1 = 6.3g, 50cents = 7.29g and 20cents = 4.5g )

Is there any faster way to get the answer other than using "guess and check" method? Guess and check is rather time-consuming.

Harry Had 289 more stamps than Dominic.

When Dominic gave away 161 of his stamps, he had half of what Harry had.
How many stamps did Dominic have at the beginning?

Pls help solving it using model.
Thanks!