PSLE Maths Answers

Paper 1


Q1. 3

Q2. 1

Q3. 1

Q4. 3

Q5. 3

Q6. 4

Q7. 3

Q8. 1

Q9. 2

Q10. 2

Q11. 4

Q12. 4

Q13. 2

Q14. 1

Q15. 4

Q16. 9 cm

Q17. 113°

Q18. 3 and 11/25

Q19. 1 and 5/21

Q20. 0.625

Q21. 6.4

Q22. 1550 ml

Q23. $ 49.20

Q24. 1/4

Q25. 10:6:3

Q26. 30 %

Q27. 4.5 km/h

Q28. 75 cm

Q29. 60

Q30. 5/9



Paper 2

Q1

List all the common factors of 12 and 18.

Ans: 1, 2, 3, 6



Q2's answers

a) West

b) Directly above the "Swing"



Q3

Ans: $ 186.90



Q4

Ans: 48 cm²



Q5

Faizal and Gary were racing. Both of them did not change their speeds throughout the race. They started at the same time and the same place. When Gary reached the finishing line, Faizal had only run 5/8 of what Gary had run. Gary speed was 75m/min faster than Faizal. What was Faizal's speed in m/min?

Ans: 125 m/min



Q6

John had 1.2m of wire. He used some of it to form a figure as shown below. (Figure has 5 lines)

a) Find how much wire he used to form this figure.

b) If k=15, find the length of wire that he did not use.

Ans: (a) (6k+3) cm (b) 27 cm



Q7

The table below shows the number of books read by pupils in a class of 30. The average number of books read by the 30 pupils is 6. What is the missing number in the table?

-----------------------------------------------------------


Average number of Books
Number of Pupils


-----------------------------------------------------------


0
10



8
15



?
5


-----------------------------------------------------------

Ans: 12



Q8

When a jar is filled with 40 screws, the jar weighs 1.4kg. When the jar is filled with 20 iron nails, the jar weighs 500g.Each screw's mass is twice that of an iron nail. What is the mass of the jar when empty?

Ans: 200 g



Q9

Angle question

Ans: 78°



Q10

Two quadrants are cut out of a rectangular sheet of paper.

Ans: 5 cm



Q11

There are 320 marbles put into 4 different boxes. Box A has the most marbles whereas Box D has the least marbles.The difference in the number of marbles in Box A to the number of marbles in Box B, C and D is 8, 13 and 19. What is the number of marbles in Box D?



Ans: 71



Q12

A group of girls wants to take some sweets. If each girls takes 11 sweets, one of the girls will only have 6 sweets.If each girl takes 8 sweets, there will be 25 sweets left over. How many sweets are there?

Ans: 105 sweets



Q13

Geometry question

Ans: 118°



Q14

A person bought a pair of shoes and a bag. He spent $57.60 in total. The pair of shoes costs $9.60 more than the bag. He was given a total discount of $22.40 for the 2 items. A 25% discount was given for the bag.

(a)Find the cost of the pair of shoes.

(b) Find the percentage of discount given for the pair of shoes.

Ans: (a) $ 33.60 (b) 30%



Q15

(Based on graph)

(a) What fraction of the tank was filled after 4 minutes?

(b) How much water flows from Tap B in 1 minute?

Ans: (a) 1/7 (b) 3.75 litres/min



Q16

Nurul and Peili shared a sum of $60. Nurul spent twice as much as Peili. What Peili had left was $7 more than what she had spent. Peili had twice as much as Nurul in the end.

(a) How much did Peili spend?

(b) How much did Nurul have at first?

Ans: (a) $11 and (b) $31



Q17

Structure Number Number of Rods Height (cm)

------------------------------------------------------------

1 12 3

2 20 3

3 25 6

4 33 6

5 38 9

6

------------------------------------------------------------

a) Fill in the number of of rods and height for structure 6. [1 mark]

b) Find the height of Structure 119. [2 marks]

c) Find the number of rods for Structure 119. [2 marks]



Ans (a)46 and 9 (b)180 (c)779



Q18

Tank B is empty and Tank A is 1/3 filled. Water flows in from a tap at a constant rate of 1.2 litres per minute.How long will it take for both tanks to be of the same height?

Refer to figure.



Ans: 15 min