Maths Problems 30 March 2011

1. In January, Peter spent $250 of his salary and saved the rest. In February, he increased his spendings by 20% and his savings decreased by 40%. How much did he save in February?

2. Mr Tan spent some money on 35 notebooks. He spent the same amount of money on another 29 pens. Each pen cost $1.75. How much did Mr Tan spend on a notebook?

3. Mrs Chia baked 120 beef pies and chicken pies. After she gave away 1/4 of the beef pies and 2/5 of the chicken pies, she was left with 30 beef pies. How many chicken pies had she left?

4. Amanda, Brett and Nick packed their luggage for a holiday. Amanda’s luggage weighed y kg. Nick’s luggage weighed 7 kg more than Amanda’s luggage. Brett’s luggage was twice as heavy as Amanda’s.
(a) Express the mass of Nick’s luggage in terms of y.
(b) If y = 5, find the total mass of their 3 luggage.

5. The ratio of the number of yellow marbles to the total number of green and red marbles was 7 : 13. 40% of the marbles were red marbles. After throwing away 65 red marbles that were chipped, 20% of the remaining marbles were red. How many marbles were there left if another 24 green marbles were found to be chipped and thrown away?

Singapore Kindness Movement Poems (unedited)

Opportunities for kindness everywhere,
Opportunities for you to share.
A simple act of giving up a seat,
Or helping someone who has weak feet.
Just giving someone his right of way
Will really brighten up YOUR day!
Yes! You will really be surprised.
If you are kind, YOUR happiness will rise!
~Devesh~


The sweetness flows through your veins
When you have done a kind deed
You will feel happier
and the sweetness will appear
~Jacques~

Thank you to all those that have helped me
Forever I will be thanking
Hopes and dreams flow within
Thank you Madam Toh for teaching me
~Ahmad~

A kind deed
Is all someone needs.
It will surely light up
one's day.
Let's say he is happy or sad,
Let's not make him feel bad.

Let's not be proud,
So let's shout out loud,
Without a doubt,
Let's make people happy,
better not make it sound crappy,
Let's not be like swines,
Instead be like dimes,
Let's shine,
And it we do these,
We will have a great great time!
~Jonathan~

You can show your sweetest kindness to everybody.
Even to those who are vehemently standing in your way.
But under no circumstances
Must you surrender to their way.
~Rainer~

To make oneself happy,
Is to help others kindly.
Helping others will,
Change your mood to happy.
I have helped others before,
Have you?
What I did was,
To help kids who were lost.
Help their mothers find their lost kids,
And I would be happy!
~Wen Xuan~

Do a kind deed to day and you'll never forget what you say.
You can show it to anyone,
Including those in your way
So if you see someone in need,
Never stop to give and give.
~Jae Shin~

Kindness...
The joy we get from helping others is priceless.
The heart wanting to help is natural.
Never expect kindness
For kindness is often shown at unexpected times.
~Bhairavi~

Kindness can be shown in many ways,s up
A lovely flower or a batchof cookies,
A smile of a friendly wave.
You might be feeling blue
But your face lights up
When you are offered a smile.
So, go on and get kindness moving!
~Ada~

To those who helped me when
I was down
To those who helped me take
away my frown
Thank you all who have
helped me
So that I can be happy
To those who always lend a helping hand
Make sure your helpfulness never ends
~Kean Sin~

Kindness is not only about what you say
It is about doing something good today.
A friend in need?
Do a kind deed.
Help everyone or anyone
It is good even if it's just one
Help someone today
And it will brighten your day
So do a kind deed!
Don't be a bad seed!
~Kyan Tan~

Comprehension OE 6

1. The vehicle had sunk.

2. It means March was not immersed in the water and his head was above the water level.

3. He was out of breath./He ran out of air.

4. David, a yachtsman, found the van first.

5. The sentence is "The van lay invisible in murky darkness, five metres down.".

6. He tried to open the door but it would not budge.

7. He tied the rope to the handle of the door of the van so that it would be easier for him (or other rescuers) to get back to the van to try to rescue Nancy.

8. There was no time to waste in saving Nancy.

9. The firemen had done a good job. They managed to save Nancy.

10. She survived the accident and was attended to by a nurse.

Making assumptions

Making assumptions

1. There are 36 pupils in a class. Each girl is given 8 books and each boy is given 3 books. The total number of books the girsl receive is 46 more than the total number of books the boys receive. How many girls are there in the class?

2. On Tree Planting day, 40 pupils planted some trees. Each boy planted 3 trees
and each girl planted 2 trees. The boys planted 30 more trees than the girls.
How many boys were there?

3. 60 children took part in a Street Soccer Competition. If each girl scored 3
goals and each boy scored 2 goals and the girls scored 20 more goals than the
boys, how many girls were there?

4. Mrs Lee had some sweets to give away to her 50 pupils. Each boy received 5
sweets and each girl received 3 sweets. The boys received 90 more sweets
than the girls. How many boys were there?

Maths 2 (22 March 2011)

1. The ratio of the number of cars to lorries to motorbikes found in a car park is
5 : 2 : 4. If there is a total of 864 wheels, find the number of motorbikes found in the car park.

2. At a multi-storey car park, there were cars, motorbikes and tricycles in the ratio 3 : 5 : 2. If there were a total of 840 wheels, find the number of cars parked at the multi-storey car park.

3. A sum of $705 is to be divided among a number of adults and children. Each adult receives $6 each, each boy receives $5 and each girl receives $4. If the ratio of adults to boys to girls is
2 : 3 : 5, how many more girls than boys are there?

4. Mdm Tan’s shop sold plates and cups. The ratio of the price of a plate to that of a cup was 3 : 2. The price of a plate was $3 more than that of a cup. Mdm Tan sold 4/7 of the items in the first month and collected $2850 from the sales. The ratio of the number of plates sold to the number of cups sold was 3 : 5.
(c) Find the total number of plates sold in the first month.
(d) Find the total number of items left after the first month.

5. A volleyball costs 440. A basketball costs $10 more. School XYZ paid $2100 for some volleyball and basketballs. The ratio of the volleyballs to the basketballs bought by the school was 5 : 3.
(a) How many basketballs did the school buy?
(b) How much more money did he spend on the volleyballs than basketballs?

Maths Problem sums 21 March 2011

Copy / print and paste the questions. The maximum score for this exercise is 13 marks. (0.83 of 13 = 10.79)

1. The mass of 2 similar metal balls and 3 similar clay pots is 10 kg. If the mass of each clay pot is 0.3 kg more than that of a metal ball, find the mass of each clay pot. (3m)

2. There are 3 bamboo poles, A, B and C. Pole A is 192.5 cm, Pole B is 1m 45 cm longer than Pole A. Pole C is twice the total length of Poles A and B.
(a) Find the total length of the 3 bamboo poles. (2m)
(b) Find the average length of the 3 poles. (1m)

3.Mr Tay planted some trees in two straight rows. Each tree was 2.5 m away from the next. There were 10 trees in the first row.

(a) What was the distance between the first and the 10th tree in the first row? (1m)

(b) In the second row, the distance from the first to the last tree was 157.5 m. How many more trees did he plant in the second than the first row? (2m)

4. Mrs Chan went shopping with $102. This amount was just enough to buy 4 T-shirts and 2 pairs of shorts. However, she decided to buy 2 T-shirts and 5 pairs of shorts instead and had $15 left. Find the cost of 1 pair of shorts. (4m)

Supplementary class is ON

Dear pupils

There will be supplementary classon Monday (21 March 2011) from 1.30pm to 3.30pm.

Your teacher
Mdm Toh