Examination on General Mathematics
Class: JSS 2
Term: First Term
Time: 1 Hour
Total Marks: 70

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

1. ________ is a method of writing numbers that are too large or too small to be conveniently written in decimal form. (a) Approximation (b) Standard form (c) Ordinary form (d) Significant figures
2. Express 56,000,000 in standard form. (a) 5.6 x 10^6 (b) 5.6 x 10^7 (c) 5.6 x 10^8 (d) 56 x 10^6
3. Round 0.0567 to two decimal places. (a) 0.05 (b) 0.06 (c) 0.56 (d) 0.57
4. What are the factors of 12? (a) 1, 2, 3, 4, 6, 12 (b) 1, 2, 3, 4, 5, 6 (c) 2, 3, 4, 6 (d) 1, 12
5. Simplify -5 + (-3). (a) -8 (b) -2 (c) 2 (d) 8
6. The additive inverse of -7 is ________. (a) -1/7 (b) 1/7 (c) -7 (d) 7
7. Solve for x in the equation 2x = 10. (a) 2 (b) 4 (c) 5 (d) 8
8. The horizontal axis on a Cartesian plane is called the ________. (a) x-axis (b) y-axis (c) origin (d) quadrant
9. Which of the following is a linear inequality? (a) 2x+3=7 (b) 5y-1>9 (c) x^2+4=0 (d) 3a=12
10. Convert 3/4 to a percentage. (a) 30% (b) 40% (c) 60% (d) 75%
11. Approximate 789.23 to the nearest whole number. (a) 780 (b) 789.2 (c) 789 (d) 790
12. Which of these is a prime factor of 30? (a) 4 (b) 5 (c) 6 (d) 10
13. Evaluate (-4) × 3. (a) -12 (b) -7 (c) 12 (d) 1
14. Solve 3n – 4 = 5. (a) 1 (b) 2 (c) 5 (d) 3
15. The point where the x-axis and y-axis intersect is called the ________. (a) quadrant (b) intercept (c) origin (d) coordinate
16. If x > 5, which of the following is a possible value for x? (a) 4 (b) 5 (c) 6 (d) 3
17. Calculate the profit if an item bought for N500 is sold for N650. (a) N150 (b) N500 (c) N650 (d) N1150
18. Convert 3.45 x 10^4 to an ordinary number. (a) 3450 (b) 34500 (c) 345000 (d) 0.000345
19. Round 2.3456 to three significant figures. (a) 2.34 (b) 2.35 (c) 2.345 (d) 2.3
20. The H.C.F of 8 and 12 is ________. (a) 4 (b) 2 (c) 8 (d) 24
21. Simplify 12 ÷ (-3). (a) 4 (b) -4 (c) -3 (d) 36
22. The multiplicative inverse of 1/5 is ________. (a) -1/5 (b) 1 (c) 5 (d) -5
23. Solve 3x – 4 = 2x + 1. (a) 1 (b) 2 (c) 3 (d) 5
24. Which of these coordinates represents a point on the y-axis? (a) (3,0) (b) (0,4) (c) (2,2) (d) (5,1)
25. The symbol ‘≤’ means ________. (a) less than or equal to (b) greater than or equal to (c) not equal to (d) approximately equal to
26. Solve the inequality x + 3 < 7. (a) x 4 (c) x 10
27. If a number is increased by 5, the result is 12. Which equation represents this? (a) n – 5 = 12 (b) 5n = 12 (c) n + 5 = 12 (d) n/5 = 12
28. In the expression 3x + 7, ‘x’ is known as the ________. (a) constant (b) coefficient (c) variable (d) term
29. Which of these is NOT a quadrant on the Cartesian plane? (a) First (b) Second (c) Zero (d) Fourth
30. The main reason for using a Cartesian plane is to ________. (a) draw pictures (b) represent points and graphs (c) measure angles (d) calculate area
31. A shirt that cost N800 was sold for N640. What is the percentage decrease? (a) 10% (b) 16% (c) 20% (d) 25%
32. The L.C.M of 6 and 9 is ________. (a) 3 (b) 18 (c) 36 (d) 54
33. All of these are factors of 24 except ________. (a) 1 (b) 6 (c) 9 (d) 12
34. Simplify 7 – (-2) + 5. (a) 0 (b) 10 (c) 14 (d) 4
35. Express 0.000078 in standard form. (a) 7.8 x 10^-5 (b) 7.8 x 10^5 (c) 78 x 10^-6 (d) 0.78 x 10^-4
36. Which of these is not a prime number? (a) 2 (b) 7 (c) 9 (d) 11
37. The correct first step in solving the equation 3x – 8 = 10 is to ________. (a) divide by 3 (b) subtract 10 (c) add 8 to both sides (d) subtract 8 from both sides
38. Round 0.0456 to one significant figure. (a) 0.04 (b) 0.05 (c) 0.1 (d) 0.046
39. If a ratio of boys to girls in a class is 2:3 and there are 10 boys, how many girls are there? (a) 12 (b) 15 (c) 20 (d) 25
40. Simplify the expression 5a + 3b – 2a + b. (a) 3a + 4b (b) 7a + 4b (c) 3a + 2b (d) 7a + 2b

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

1. (a) Define standard form of a number. (2 marks)
(b) Express 0.0000045 in standard form and 7.2 x 10^5 in ordinary form. (3 marks)
(c) Round 23.457 to: (i) two decimal places (ii) the nearest whole number. (3 marks)
(d) State two uses of approximation in everyday life. (2 marks)

2. (a) What is an integer? Give two examples. (2 marks)
(b) Simplify: -8 + 5 – (-3). (3 marks)
(c) Find the product of the additive inverse of 6 and the multiplicative inverse of 1/2. (3 marks)
(d) List all the prime factors of 42. (2 marks)

3. (a) Define a linear equation. (2 marks)
(b) Solve for x: 5x – 7 = 3x + 11. (3 marks)
(c) A shopkeeper bought an item for N1,200 and sold it for N1,560. Calculate the profit percentage. (3 marks)
(d) If y is a number such that y > -2, list three possible integer values for y. (2 marks)

4. (a) Explain what the x-axis and y-axis represent on a Cartesian plane. (2 marks)
(b) State the quadrant for each of the following points: P(5, -2), Q(-3, -1), R(4, 6). (3 marks)
(c) Convert 4/5 to a percentage and 35% to a fraction in its simplest form. (3 marks)
(d) Find the H.C.F of 18 and 24. (2 marks)

Objective Marking Scheme

Question 1 – ✅ (b) Standard form
Question 2 – ✅ (b) 5.6 x 10^7
Question 3 – ✅ (b) 0.06
Question 4 – ✅ (a) 1, 2, 3, 4, 6, 12
Question 5 – ✅ (a) -8
Question 6 – ✅ (d) 7
Question 7 – ✅ (c) 5
Question 8 – ✅ (a) x-axis
Question 9 – ✅ (b) 5y-1>9
Question 10 – ✅ (d) 75%
Question 11 – ✅ (c) 789
Question 12 – ✅ (b) 5
Question 13 – ✅ (a) -12
Question 14 – ✅ (d) 3
Question 15 – ✅ (c) origin
Question 16 – ✅ (c) 6
Question 17 – ✅ (a) N150
Question 18 – ✅ (b) 34500
Question 19 – ✅ (b) 2.35
Question 20 – ✅ (a) 4
Question 21 – ✅ (b) -4
Question 22 – ✅ (c) 5
Question 23 – ✅ (d) 5
Question 24 – ✅ (b) (0,4)
Question 25 – ✅ (a) less than or equal to
Question 26 – ✅ (a) x < 4
Question 27 – ✅ (c) n + 5 = 12
Question 28 – ✅ (c) variable
Question 29 – ✅ (c) Zero
Question 30 – ✅ (b) represent points and graphs
Question 31 – ✅ (c) 20%
Question 32 – ✅ (b) 18
Question 33 – ✅ (c) 9
Question 34 – ✅ (c) 14
Question 35 – ✅ (a) 7.8 x 10^-5
Question 36 – ✅ (c) 9
Question 37 – ✅ (c) add 8 to both sides
Question 38 – ✅ (b) 0.05
Question 39 – ✅ (b) 15
Question 40 – ✅ (a) 3a + 4b