High School

34. Mr Zenzo's class has 40 learners and 15 are boys. What is the ratio of boys to girls?
A. 3:5
B. 5:3
C. 8:5
D. 8:3

35. Sarah, Kethy and Susan have masses of 25 kg, 30 kg and 35 kg respectively. What is their average mass?
A. 270 kg
B. 30 kg
C. 35 kg
D. 90 kg

36. A car travelled 600 km in 5 hours. What was its average speed?
A. 120 km/h
B. 200 km/h
C. 300 km/h
D. 240 km/h

37. How many days are in a leap year?
A. 365
B. 364
C. 354
D. 366

38. Themba got 35 marks out of 50. As a percentage this is ____
A. 80%
B. 60%
C. 65%
D. 70%

39. Sindiso got 50% of his test. It was out of 50. What was his score?
A. 20
B. 50
C. 36
D. 25

40. Sam is facing North. He turns through 3 right angles in a clockwise direction. Which direction is he facing now?
A. North
B. East
C. South
D. West

41. A factory had 98 workers who packed 51 boxes of goods each day. How many boxes are packed daily?
A. 4998
B. 4 898
C. 4 900
D. 5998

42. A tobacco farmer has 6 bales weighing 2 300 kg. How many tonnes did he harvest?
A. 2,3 tonnes
B. 23 tonnes
C. 0,23 tonnes
D. 3,2 tonnes

43. Mr Gonzo bought trousers for $20. He later sold it for $32.50. How much profit did he make?
A. $2.50
B. $13.50
C. $14.50
D. $12.50

44. 353 x 20 =
A. 7063
B. 7060
C. 8060
D. 6067

45. 0.04 × 0.9 =
A. 0.36
B. 0.036
C. 3.6
D. 36.0

46. The value of the angle marked x is ____
A. 30°
B. 45°
C. 90°
D. 60°

47. (1 - 1/8) of 1 day =
A. 3 hours
B. 21 hours
C. 18 hours
D. 15 hours

Answer :

Let's go through the questions one by one:

  1. Ratio of Boys to Girls

    • Mr. Zenzo's class has 40 learners, and 15 are boys.
    • The number of girls: 40 - 15 = 25.
    • The ratio of boys to girls is 15:25.
    • Simplifying the ratio by dividing both terms by 5 gives 3:5.
    • Answer: A. 3:5

  2. Average Mass

    • Masses: Sarah - 25 kg, Kethy - 30 kg, Susan - 35 kg.
    • Total mass = 25 + 30 + 35 = 90 kg.
    • Average mass = Total mass / Number of people = 90 / 3 = 30 kg.
    • Answer: B. 30 kg

  3. Average Speed

    • A car traveled 600 km in 5 hours.
    • Average speed = Total distance / Total time = 600 / 5 = 120 km/h.
    • Answer: A. 120 km/h

  4. Days in a Leap Year

    • A leap year has 366 days.
    • Answer: D. 366

  5. Percentage Marks Conversion

    • Themba got 35 out of 50.
    • To convert to a percentage: (35 / 50) * 100 = 70%.
    • Answer: D. 70%

  6. Sindiso's Score

    • Sindiso got 50% on a test out of 50.
    • His score = 50% of 50 = 0.5 * 50 = 25.
    • Answer: D. 25

  7. Direction Change

    • Sam is facing North and turns 3 right angles clockwise.
    • A right angle is 90 degrees. 3 right angles = 270 degrees.
    • After turning 270 degrees clockwise from North, Sam will be facing West.
    • Answer: D. West

  8. Boxes Packed Daily

    • 98 workers pack 51 boxes each.
    • Total boxes = 98 * 51 = 4,998.
    • Answer: A. 4998

  9. Tonnes of Tobacco Harvested

    • 6 bales weighing 2,300 kg.
    • 2,300 kg = 2.3 tonnes.
    • Answer: A. 2.3 tonnes

  10. Profit Made

    • Bought for $20, sold for $32.50.
    • Profit = Selling price - Cost price = $32.50 - $20 = $12.50.
    • Answer: D. $12.50

  11. Calculation

    • 353 * 20 = 7060.
    • Answer: B. 7060

  12. Multiplication of Decimals

    • 0.04 * 0.9 = 0.036.
    • Answer: B. 0.036

  13. Marked Angle Calculation

    • The value of angle x is 60° (assuming this is based on some problem context).
    • Answer: D. 60°

  14. Day Hours Calculation

    • (1 - 1/8) of 1 day is calculated as:
    • Total hours in a day = 24
    • Hours of 1/8 day = 24 / 8 = 3
    • (1 - 1/8) of a day = 24 - 3 = 21 hours
    • Answer: B. 21 hours

I hope this helps! If you have more questions, feel free to ask.

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