Sakamoto method

2011 PSLE Maths Question 5

5. Mr Tan spent ¼ of his money on a pair of shoes. He then spent 2/5 of the remaining money on a bag. After he received $120 from Mrs Tan, the ratio in the amount of money he had in the end to the amount of money he had at first became 5:4. How much money did Mr Tan have at first?

2011 PSLE Maths Question 4

4. In a school hall rehearsal, there were 9 chairs in each row. After Mr Lim brought in 6 more chairs for the actual concert, each row had 7 chairs and 12 more rows. How may chairs were used for the actual concert?

2011 PSLE Maths Question 3 Sakamoto Method

3. A fruit stall sells its pear at 70¢ and apples at 40¢. Sally bought some pears and Tom bought some apples. Sally spent $1.10 more than Tom but had 7 less fruits than him.

a) How much pears did Sally buy?
b) How much money did Tom spend?

2011 PSLE Maths Question 2 Sakamoto Method

2. There are teachers and students who bought tickets. The price of each ticket for a teacher is $20 while that of a student costs $8. The number of tickets bought by the teachers is ¼ of the total number of tickets bought. The amount of money collected from the students is $416 more than that from the teachers. What is the total amount of money collected?

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2011 PSLE Maths Question 1 Sakamto Method

1. There are 5 tins of marbles, each tin with same number of marbles in them. 18 marbles were taken away from each of them, and in the end, these 5 tins have the same number of marbles as original number of marbles of two tins. How many marbles were there in each tin at first?

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Whole numbers 1 Q8 (PSLE Math Problem sum )

8. Edwin had 35 more correction pens than Faith. Every month, Edwin used 3
correction pens while Faith used 1 correction pen. When Edwin had used all his
correction pens, Faith still had 5 correction, pens left.
(a) How many months did Edwin take to use all his correction pens?
(b) How many correction pens did Edwin have at first?

Answer:

Whole numbers 1 Q7 (PSLE Math Problem sum )

7. Jacky had enough money to buy exactly a book and 5 pens. However, he bought
only a book and 3 pens. He was left with $24. If the book cost $15 and each of the
pens costs the same, how much money did Jacky have originally?

Answer:

Whole numbers 1 Q6 (PSLE Math Problem sum )

6. There were thrice as many pears as apples at a fruit stall. After the fruit seller sold 274 pears and 18 apples, there were twice as many apples as pears left at the stall. Find the total number of pears and apples at the stall at first.

Answer:

Whole numbers 1 Q5 (PSLE Math Problem sum )

5. Jimmy had 5 times as many stickers as Percy. After Jimmy bought 18 more
stickers and Percy bought 40 more, the difference between the number of stickers
they had was 30. How many stickers does Jimmy have now?

Answer:

Whole numbers 1 Q4 (PSLE Math Problem sum )

4. Adrian and Ben shared a sum of $256. if Adrian spent $44 and gave $10
to Ben, Adrian would have $18 less than Ben. How much money did Ben have at first?

Answer:

Whole numbers 1 Q3 (PSLE Math Problem sum )

3. At a Math quiz, 20 questions were asked. 5 marks were awarded for each correct
answer and 2 marks were deducted for each incorrect answer. Brian scored 65
marks. How many correct answers did he have?

Answer:

Whole numbers 1 Q2 (PSLE Math Problem sum )

2. The total mass of 5 apples and 3 oranges is 383g. The total mass of 3 apples and 5 oranges is 393g. Find the mass of 2 apples.

Answer:

Whole numbers 1 Q1 (PSLE Math Problem sum )

1. 11 lanterns were hung at equal distances apart in a row. The distance between the first and the fifth lantern is 16 m. What was the distance between the first and the eleventh lantern?

Answer:

Muliples concept Q3 (PSLE challenging math problem sum)

3. The number of apples at a stall is between 50 and 80. If they are put into bags of 8 apples each, there will be 7 apples left over. If they are put into bags of 6 apples each, there will be 3 apples left over. How many apples are there at the stall?

Muliples concept Q2 (PSLE challenging math problem sum)

2. John has a packet of less than 40 marbles. V- he gives each of his friends 5 marbles, there will be 4 marbles short. If he gives 4 marbles to each of his friends, there will be 3 marbles left over. How many friends did he give the marbles to?

Muliples concept Q1 (PSLE challenging math problem sum)

1. The number of beads in a packet is between 50 and 30. If Janet puts them into groups of 5 beads each, there will be a remainder of 3 beads. If she puts them into groups of 9 beads each, there will be a remainder of 6 beads. How many beads are there in the packet?

Answer:

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Whole numbers Q6 (PSLE Problem sum)

6. A shipping company transported 1000 parcels to another country for Mr Ong. It charged Mr Ong $15 for each parcel safely transported but it had to pay him $50 for every damaged parcel. If Mr Ong paid a total of $14220 to the shipping company, how many of the parcels were damaged?


Answer:

Whole numbers Q5 (PSLE Problem sum)

5. A calculator cost $22. A pen cost $4 less than a calculator.
Mr Pang bought half as many calculators as pens. He paid a total of $3480 for
the calculators and pens. How many pens did Mr Pang buy?

Answer:

Whole numbers Q4 (PSLE Problem sum)

4. For every magazine Ali sells, he earns $0.40. A bonus of $3 is given to him for every 80 magazines he sells. How many magazines must Ali sell to earn $881?

Answer:

Whole numbers Q3 (PSLE Problem sum)

3. Mrs Ng received $4 for every box of chocolate sold. In addition, she received an extra $15 for every 12 boxes of chocolates sold. If she received $3040, how many boxes of chocolates did she sell in all?

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Whole numbers Q2 (PSLE Problem sum)

2. Mr Lim bought a total of 96 tables and chairs for $2547. When 30 chairs were given away, there were an equal number of tables and chairs left.

(a) How many chairs did Mr Lim buy?
(b) If each table costs $19 more than each chair, find the cost of each chair.

Answer:

Whole numbers Q1 (PSLE Problem sum)

1. Leon has $78 less than Jack. Mark, has $59 more than the total amount that Leon
and Jack have. Mark has $523 more than Leon.

(a) How much money has Leon?
(b) What is the total amount of money that the three of them have?
(Include a clearly-labelled model as part of your working.)

Answer:

Introduction

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I am going to create a blog and post challenging P5 and P6 problem sums for your PSLE preparation. Please sit tight and prepare for the flight!