Examination on General Mathematics
Class: Primary 4
Term: Second Term
Time: 1 Hour
Total Marks: 70

SECTION A: OBJECTIVES (40 Marks)
Instruction: Answer all questions.

1. ________ is the process of finding an approximate value for a number or quantity. (a) Counting (b) Estimation (c) Calculation (d) Measuring
2. A mathematical statement with a missing number, often represented by a letter or symbol, is called an ________ sentence. (a) closed (b) complete (c) open (d) unsolved
3. An example of a unit used to measure length is ________. (a) kilogram (b) litre (c) metre (d) hour
4. Which of the following is equivalent to 1,000 metres? (a) 1 centimetre (b) 1 kilometre (c) 1 millimetre (d) 1 gram
5. All of these are units for measuring time except ________. (a) second (b) minute (c) metre (d) hour
6. Which of these is NOT a common unit for measuring weight? (a) kilogram (b) gram (c) milligram (d) kilometre
7. The main reason we use AM and PM is to ________. (a) show the day of the week (b) differentiate between morning and afternoon/evening hours (c) measure the duration of an event (d) convert time to 24-hour format
8. The correct step to calculate profit is ________. (a) Cost Price – Selling Price (b) Selling Price + Cost Price (c) Selling Price – Cost Price (d) Cost Price ÷ Selling Price
9. Which of these is not a common format for writing a date? (a) 12/05/2023 (b) May 12, 2023 (c) 12th of May, 2023 (d) 12km May 2023
10. Rounding 27.3 to the nearest whole number gives ________. (a) 27 (b) 28 (c) 20 (d) 30
11. If N450.00 is divided equally among 3 children, how much does each child receive? (a) N100.00 (b) N150.00 (c) N200.00 (d) N120.00
12. What is the value of ‘x’ in the open sentence: 15 + x = 30? (a) 45 (b) 20 (c) 15 (d) 10
13. Converting 5 hours into minutes gives ________ minutes. (a) 50 (b) 180 (c) 300 (d) 360
14. A shopkeeper bought a bag for N1,200 and sold it for N1,550. What is his profit? (a) N250 (b) N350 (c) N300 (d) N450
15. Which of these times represents 3 hours after 9:00 AM? (a) 11:00 AM (b) 12:00 PM (c) 1:00 PM (d) 12:00 AM
16. To estimate the product of 31 and 68, you would first round them to ________. (a) 30 and 60 (b) 30 and 70 (c) 40 and 70 (d) 30 and 80
17. If you have N2,000 and buy items worth N1,350, how much change will you get? (a) N750 (b) N650 (c) N550 (d) N700
18. How many days are there in the month of July? (a) 30 (b) 29 (c) 31 (d) 28
19. The long hand of an analogue clock points to the ________. (a) hour (b) minute (c) second (d) day
20. Adding 4.2 kg and 2.9 kg gives a total weight of ________. (a) 6.1 kg (b) 7.1 kg (c) 6.9 kg (d) 7.2 kg

SECTION B: THEORY (30 Marks)
Instruction: Answer any THREE questions.

1. (a) Explain what an open sentence is in mathematics. (2 marks)
(b) Round 38.45 to the nearest whole number and estimate the sum of 38.45 + 21.60 to the nearest whole number. (3 marks)
(c) A trader bought 10 packets of sweets for N800 each and sold them for N950 each. Calculate the total profit made. (3 marks)
(d) Find the missing number in the open sentence: 63 ÷ y = 7. (2 marks)

2. (a) List two common units for measuring length. (2 marks)
(b) Convert 7 km 50 m into metres. (3 marks)
(c) A bag of rice weighs 50 kg. If 3 such bags are bought, what is the total weight in kg? (3 marks)
(d) Explain the difference between 10:00 AM and 10:00 PM. (2 marks)

3. (a) Write the full date for today’s current day (e.g., Monday, 15th January, 2024). (2 marks)
(b) If a bus journey starts at 8:45 AM and takes 3 hours 30 minutes, what time will the bus arrive? (3 marks)
(c) Sarah had N7,500. She bought a dress for N3,800 and shoes for N2,150. How much money does she have left? (3 marks)
(d) How many seconds are there in 5 minutes? (2 marks)

4. (a) A carpenter used 4.7 metres of wood for a table and 2.6 metres for a chair. What is the total length of wood used? (2 marks)
(b) A carton contains 12 packets of milk, and each packet weighs 250 grams. What is the total weight of milk in the carton in grams? (3 marks)
(c) Solve for ‘m’ in the open sentence: m – 23 = 58. (3 marks)
(d) A ribbon is 25 metres long. If it is cut into 5 equal pieces, what is the length of each piece in metres? (2 marks)

Objective Marking Scheme
Question 1 – ✅ (b) Estimation
Question 2 – ✅ (c) open
Question 3 – ✅ (c) metre
Question 4 – ✅ (b) 1 kilometre
Question 5 – ✅ (c) metre
Question 6 – ✅ (d) kilometre
Question 7 – ✅ (b) differentiate between morning and afternoon/evening hours
Question 8 – ✅ (c) Selling Price – Cost Price
Question 9 – ✅ (d) 12km May 2023
Question 10 – ✅ (a) 27
Question 11 – ✅ (b) N150.00
Question 12 – ✅ (c) 15
Question 13 – ✅ (c) 300
Question 14 – ✅ (b) N350
Question 15 – ✅ (b) 12:00 PM
Question 16 – ✅ (b) 30 and 70
Question 17 – ✅ (b) N650
Question 18 – ✅ (c) 31
Question 19 – ✅ (b) minute
Question 20 – ✅ (b) 7.1 kg