Sarin and his coin bank part 49 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills of dealing with the Math Modeling, the Math problem solving and the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Ratio and Problem Solving.

You can read the posting on Sarin and his coin bank for the story of coin bank.

Read the posting on Sarin learns concept of ratio in school to understand Ratio.

Challenge yourself with the Question before look out for the given solution‼!

Upper primary school mathematics question UPQ509

Sarin has 18 coins in his coin bank. He has 6 more coins than Hairu and 12 fewer coins than Fatimah. Find the ratio of the number of Sarin’s coins to the number of Hairu’s coins to the number of Fatimah’s coins.

…Click to know the solution…

Sarin learns Perimeter, Area and Volume in school part 109 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can acquire the skill of dealing with the Math Modeling, the Math Problem Solving and the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Shape and Area

You can read posting Sarin learns Perimeter, Area and Volume in school (Math Concept) to learn the concept of area.

Read also the posting on Sarin learns Shapes and Solids in school (Math Concept) to know about shapes.

Challenge yourself with the question before look out for the given solution‼!

Upper primary school mathematics question UPQ508

The figure below, not drawn to scale is made up of a rectangle ABCD and a semicircle. E and F are mid-points of AB and DC respectively. The length of DC is 20 cm. EO is ½ of EF. Find the total area of the yellow region of the figure. (Take π = 3.14)

UPQ508-1

-Click here to read the answer…>

Fatimah and Hairu enjoy Congkak game part 30 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can aquire the skills of dealing with the Math Modeling, the Math Problem Solving and the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on AlgebraRatio and Problem Sum.

Read the posting on Fatimah and Hairu play Congkak to know about Congkak game.

Read the posting on Sarin learns Symbol, Algebra and Equation in school (Math Concept) to understand the concept of Algebra.

Read also the posting on Sarin learns the concept of Ratio (mathematics concept) to understand Ratio.

Challenge yourself with the question before look for the given solution‼!

Upper primary school mathematics question UPQ507

After a congkak game, Hairu and Fatimah each has a certain number of marbles. If Fatimah gives Hairu 40 marbles, Hairu will have twice as many marbles as Fatimah. If Hairu gives Fatimah 40 marbles, Fatimah will have thrice as many marbles as Hairu. How many more marbles does Fatimah have than Hairu?

…Click here to read the solution…

Sarin learns Perimeter, Area and Volume in school part 108 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can acquire the skill of dealing with the Math Modeling, the Math Problem Solving and the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Shape and Area

You can read posting Sarin learns Perimeter, Area and Volume in school (Math Concept) to learn the concept of area.

Read also the posting on Sarin learns Shapes and Solids in school (Math Concept) to know about shapes.

Challenge yourself with the question before look out for the given solution‼!

Upper primary school mathematics question UPQ506

The figure below, not drawn to scale, is made up of 4 identical circles and an equilateral triangle touching the points A, B and C on the circles. If the area of the triangle is 81 cm2 and the diameter of the circle is 16 cm, find the area of the blue region. (π = 3.14) Express your answer correct to 2 decimal places.

UPQ506-1

Solution:

UPQ506-2

The radius of the circle = 16 ÷ 2 = 8 cm

1/6 of the area of one circle = 1/6 × π × 8 × 8 = 32π/3 cm2

The area of the yellow triangle is 1/3 of triangle ABC

1/3 of the area of the triangle ABC = 81 ÷ 3 = 27 cm2

1/2 of the area of the blue region = (32π/3 – 27) = 6.49 cm2

The area of the blue region = 2 × 6.49 = 12.99 cm2

   More Questions on Area. Click here….

Sarin’s family attend concert at the Esplanade Part 30 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings on Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn how to deal with the Math Modeling, the Math Problem Solving and the Problem Sum from Lower Primary School to Upper Primary School level. This posting is an upper primary school math question on Fraction and Charting.

The story on Sarin’s family attend concert at the Esplanade you can read postings on Sarin’s family attend concert at the Esplanade in Welcome category and Sarin’s family attend concert at the Esplanade Part 2 (Math Question).

Click and read the posting on Sarin learns the concept of Fraction (mathematics concept) to understand Portion or Fraction.

Read also the posting on Sarin learns Average Number, Percentage and and Charting in school (Math Concept) to understand the concept of Charting.

Upper primary school mathematics question UPQ505

The Esplanade conducted a survey to find out the favourite performance art that the audience preferred. The pie chart below shows the survey results and a table that shows part of the results collected.

UPQ505-1

UPQ505-2

How many audience selected Symphony Orchestra as their favourite performance art?

Solution:

Per the pie chart,

¼ fraction of the pie chart ==> Chinese dance

¼ fraction of the pie chart ==> Choir

The number of audience selected Chinese = 50

½ of the pie chart ==> 2 × 50 = 100 audience

The number of audience selected Symphony Orchestra = 100 – 78 = 22

   More Questions on Charting. Click here…

More Questions on Fraction. Click here….

Sarin learns Perimeter, Area and Volume in school part 107 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can acquire the skill of dealing with the Math Modeling, the Math Problem Solving and the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Shape and Area

You can read posting Sarin learns Perimeter, Area and Volume in school (Math Concept) to learn the concept of area.

Read also the posting on Sarin learns Shapes and Solids in school (Math Concept) to know about shapes.

Challenge yourself with the question before look out for the given solution‼!

Upper primary school mathematics question UPQ504

The figure below shows two identical right-angled triangles overlapping each other. Find the area of the blue region.

UPQ504-1

Solution:

UPQ504-2

The two triangles are identical,

The yellow region is overlapping and same in area/size

Therefore,

            The area of blue region is equal to the white region

The area of the blue region = 9 × 6 + ½ × 3 × 6 = 63 cm2

   More Questions on Area. Click here….

Sarin’s family attend concert at the Esplanade Part 29 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings on Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn how to deal with the Math Modeling, the Math Problem Solving and the Problem Sum from Lower Primary School to Upper Primary School level. This posting is an upper primary school math question on FractionRatio, Algebra and Problem Sum.

The story on Sarin’s family attend concert at the Esplanade you can read postings on Sarin’s family attend concert at the Esplanade in Welcome category and Sarin’s family attend concert at the Esplanade Part 2 (Math Question).

Click and read the posting on Sarin learns the concept of Fraction (mathematics concept) to understand Portion or Fraction.

You should read also the posting on Sarin learns concept of ratio in school to understand mathematics concept of Ratio.

Read the posting on Sarin learns Symbol, Algebra and Equation in school (Math Concept) to understand the concept of Algebra.

Upper primary school mathematics question UPQ503

There were 160 novels and comics on a shelf of the Esplande Library. When 2/5 of the novels and 2/3 of the comics were borrowed by the library users, the total number of novels and comics left on the shelf became 72. How many novels were there on the shelf at first?

…Click here to go to the solution…

Sarin’s family in Kluang part 19 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills of dealing with the Math Modeling, the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Ratio and Problem solving.

Read the posting on Sarin’s family in Kluang about Sarin’s family venture in Kluang.

You can read the posting on Sarin learns concept of ratio in school to understand the concept of Ratio.

Challenge yourself with the question before look out for the given solution‼!

Upper primary school mathematics question UPQ502

Sarin and Fatimah went shopping together in Kluang Mall. They had a total sum of $144 for shopping. The ratio of the amount Sarin spent to the amount Fatimah spent is 4 : 3. The amount that Fatimah had left was $9 more than what she had spent. She had thrice as much money left as Sarin.

(a) How much money did Fatimah spend?

(b) How much money did Sarin have at first?

…Click here to read the solution…

Hairu shares his stickers part 63 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about Solving the Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids will learn the skills of dealing with the Math Problem Solving, the Math Modeling and the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Percentage, AlgebraRatio and Problem Sum.

You can read the posting on Sarin learns the concept of Ratio (mathematics concept) to understand the concept of Ratio.

You should also read the posting on Sarin learns Average Number, Percentage and Charting in school (Math Concept) to understand Percentage.

Read the posting on Sarin learns Symbol, Algebra and Equation in school (Math Concept) to understand the concept of Algebra.

Challenge yourself with the question before look out for the given solution‼!

Upper primary school mathematics question UPQ501

Hairu and Sarin have a sum of stickers. The number of stickers Hairu had was 30 more than Sarin at first. After Sarin lost 25% of his stickers and then Hairu got 40% more of the number of stickers he has, the ratio of the number of stickers that Hairu has to the number of stickers that Sarin has become 8 : 3. Find the number of stickers that Hairu has finally.

…To click here to go to solution…

Hairu and the numbers part 26 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings on Solving Singapore Primary School Mathematics. The blog presents the Math Concept, Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills of dealing with Math Question Solving, Math Modeling and Problem Sums from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Number.

Read posting Sarin and the million numbers and Hairu and the numbers to understand the mathematics concept of numbers.

Challenge yourself with the question before look for the given solution‼!

Upper primary school mathematics question UPQ500

When a number is divided by 5, the quotient is 115 with no remainder. What is the remainder when the same number is divided by 8?

…Click to read the solution…