Primary 6 Maths Weighted Assessment 1 (WA1) 2025 – Test 1

5. WA1,ACSJ,2025,WA1ACSJ2025,Fractions,Primary 6A stationery shop had 324 more pens than erasers. After ²⁄₃ of the pens and ¹⁄₂ of the erasers
were sold,the total number of pens and erasers left was 378. How many pens and erasers did
the shop have at first?

Answer: pens and erasers

📖 REMINDER: Let erasers = E. Pens = E + 324. Pens left = ¹⁄₃(E + 324).

6. WA1,ACSJ,2025,WA1ACSJ2025,Ratio,Primary 6The figure below shows Circle X overlapping Circle Y. The ratio of the area of Circle X
to the shaded area is 8 : 1.The ratio of the area of Circle Y to the shaded area is 6 : 1.
The area of the shaded region is 9 cm². Find the area of the whole figure. 

Answer: cm²

📖 REMINDER: Shaded = 1 unit = 9 cm². Circle X = 8 units, Circle Y = 6 units.

9. A piece of wire is 9 m long. Ravi cut it into smaller pieces of length ¹⁄₆ m to make frames. How many pieces did he get?

Answer: pieces
WA1,ACSJ,2025,WA1ACSJ2025,Fractions,Primary 6

📖 REMINDER: Number of pieces = total length ÷ length per piece = 9 ÷ ¹⁄₆ = 9 × 6.

10. 45 : ? : 72 = 5 : 7 : 8

What is the missing number in the box?

Answer:

📖 REMINDER: Find the scale factor by dividing a known value by its ratio part (45 ÷ 5 = 9). Multiply 7 by the same scale factor to find the missing number.

 WA1,ACSJ,2025,WA1ACSJ2025,Ratio,Primary 6

11. Find the value of 9660 ÷ 42.

Answer:

📖 REMINDER: Simplify first by dividing both numbers by a common factor, then use long division to find the answer.

WA1,ACSJ,2025,WA1ACSJ2025,Whole Numbers,Primary 6

12. In a school of 80 teachers, 28 teachers travel to school by MRT. What percentage of the teachers
travel to school by MRT?

Answer: %

📖 REMINDER: Percentage = (part ÷ whole) × 100%. 

WA1,ACSJ,2025,WA1ACSJ2025,Percentage,Primary 6

13. The ratio of the length of a rectangle to its breadth is 5 : 3. Express the length of the rectangle
as a fraction of its perimeter. Give your answer in its simplest form.

Answer:

📖 REMINDER: Let length = 5u, breadth = 3u. Perimeter = 2 × (5u + 3u) = 16u. Fraction = ^5u⁄_16u = ⁵⁄₁₆.

14. WA1,ACSJ,2025,WA1ACSJ2025,Fractions,Primary 6 ³⁄₇ of a number is 54. What is ¹⁄₆ of the number?

Answer:

📖 REMINDER: Find the whole number first. ³⁄₇ = 54, so ¹⁄₇ = 18 and the whole = 7 × 18 = 126. Then find ¹⁄₆ of 126.

15. A departmental store had a storewide sale of 60%. Mrs Tan paid $480 for a television during the sale.
What was the usual price of the television?
WA1,ACSJ,2025,WA1ACSJ2025,Percentage,Primary 6

Answer: $ 

📖 REMINDER: Sale price = (100% − 60%) = 40% of usual price. 

16. The table below shows the prices of 3 noodle dishes. Auntie Mary ordered two different types of noodle dishes and paid
a total of $14.16, including 9% GST. Which 2 noodle dishes did she order?

WA1,ACSJ,2025,WA1ACSJ2025,Percentage,Primary 6
Answer: Wanton Mee & Prawn Noodles Prawn Noodles & LaksaWanton Mee & Laksa

📖 REMINDER: Divide $14.16 by 1.09 to find the price before GST. Then check which pair of dishes adds up to that amount.

17. Dan, Eve and Fay shared 420 stamps. Each of them received another 40 stamps. In the end,the ratio of the
number of stamps held by Dan, Eve and Fay was 3 : 4 : 5. How many stamps did Fay have in the end?

Answer:   stamps

📖 REMINDER: Total stamps after extras = 420 + (3 × 40). 

18. Mrs Goh bought some cupcakes from a shop. The cost of each cupcake is $3. For every 3 cupcakes she bought,
1 cupcake was given free. Mrs Goh paid $189 altogether. What was the greatest number of cupcakes Mrs Goh
would get from the shop?

WA1,ACSJ,2025,WA1ACSJ2025,Whole Numbers,Primary 6
Answer:   cupcakes

📖 REMINDER: Each deal = 3 bought + 1 free = 4 cupcakes for $9.