Mean, median, mode & bar graphs Quiz - ICSE Class 7 Mathematics

Free practice quiz: Mean, median, mode & bar graphs (ICSE Class 7 Mathematics). 42 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 7 Mathematics practice quiz has 42 multiple-choice questions on Mean, median, mode & bar graphs, and 42 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. The mean of the first five natural numbers is:

   1. 2
   2. 3
   3. 4
   4. 5
   Show answer

   Answer: B. 3

   The first five natural numbers are 1, 2, 3, 4, and 5. Their sum is 1 + 2 + 3 + 4 + 5 = 15. The mean is the sum divided by the count, so 15 / 5 = 3.

2. The heights of 7 children in centimeters are: 120, 125, 122, 130, 125, 128, 125. What is the mode of their heights?

   1. 120
   2. 122
   3. 125
   4. 130
   Show answer

   Answer: C. 125

   The mode is the value that appears most frequently. Let's count the occurrences of each height: 120 appears 1 time. 122 appears 1 time. 125 appears 3 times. 128 appears 1 time. 130 appears 1 time. The height that appears most frequently is 125.

3. In a class, the scores of 7 students in a test are 55, 60, 65, 55, 70, 65, 55. What is the median score?

   1. 55
   2. 60
   3. 65
   4. 70
   Show answer

   Answer: B. 60

   First, arrange the scores in ascending order: 55, 55, 55, 60, 65, 65, 70. There are 7 scores (an odd number). The median is the middle score, which is the 4th score. The 4th score is 60.

4. The mode of the data set {50, 60, 70, 60, 80, 90, 60, 70} is:

   1. 50
   2. 60
   3. 70
   4. 80
   Show answer

   Answer: B. 60

   To find the mode, count the frequency of each number: 50 appears 1 time. 60 appears 3 times. 70 appears 2 times. 80 appears 1 time. 90 appears 1 time. The number that appears most frequently is 60.

5. The marks of 9 students in a Science quiz are: 8, 9, 7, 9, 8, 10, 9, 7, 9. What is the median mark?

   1. 8
   2. 9
   3. 7
   4. 10
   Show answer

   Answer: B. 9

   First, arrange the marks in ascending order: 7, 7, 8, 8, 9, 9, 9, 9, 10. There are 9 marks (an odd number). The median is the middle mark, which is the 5th mark in the ordered list. The 5th mark is 9.

More questions in this quiz

Answers and explanations are in the full quiz.

1. The mean of 6 numbers is 15. If one number is removed, the mean of the remaining 5 numbers is 14. What is the removed number?
2. In a data set {1, 2, 2, 3, 4, 4, 4, 5}, what is the median?
3. Which measure of central tendency is most affected by outliers?
4. If the mode of a data set is 25, what does this imply?
5. The scores of a student in 5 subjects are 78, 85, 92, 70, 85. What is the median score?
6. The mean of 5 numbers is 12. If one number is added, the mean becomes 13. What is the added number?
7. What is the median of the following data: 11, 15, 18, 11, 12, 15, 18, 12, 15?
8. If the mean of the first 'n' natural numbers is 20, what is the value of 'n'?
9. The median of the data set {5, 2, 8, 1, 9, 4, 7} is:
10. The mode of the data set {23, 45, 67, 45, 89, 45, 67, 45, 23} is:
11. If the mean of 8 numbers is 22, what is their sum?
12. A bar graph shows the rainfall in a city over 5 days. If the rainfall amounts are 2 cm, 3 cm, 1 cm, 4 cm, 2 cm, what is the median rainfall?
13. The mode of the data set {a, b, c, a, b, a} is 'a'. What can we conclude?
14. The mean of 4 numbers is 18. If one number is increased by 10, what is the new mean?
15. The following data represents the number of cars sold by a dealership each day: Mon: 5, Tue: 7, Wed: 5, Thu: 8, Fri: 5, Sat: 9, Sun: 7. What is the mode of cars sold per day?
16. What is the mean of the first 5 even natural numbers?
17. What is the mean of the first 7 odd natural numbers?
18. The median of the data set {2, 7, 4, 1, 9, 5, 6} is:
19. The marks obtained by 10 students in a Mathematics test are: 60, 75, 80, 65, 75, 90, 75, 85, 70, 75. What is the mode of the marks?
20. The mean of 3 numbers is 15. If one number is 10, what is the mean of the other two numbers?
21. The mean of 5 numbers is 30. If one number is removed, the mean of the remaining 4 numbers is 28. What is the removed number?
22. What is the median of the data set {9, 2, 7, 5, 4, 8, 6}?
23. The mean of the first 10 natural numbers is:
24. In a data set {3, 5, 7, 3, 9, 3, 5}, what is the median?
25. The heights of 10 plants in centimeters are: 12, 15, 18, 15, 20, 15, 22, 15, 18, 20. What is the mode of the heights?
26. If the mean of 5 numbers is 25, and one number is 20, what is the mean of the other four numbers?
27. The weights (in kg) of 6 students are: 45, 50, 48, 52, 45, 47. What is the median weight?
28. What is the median of the data set {1, 5, 2, 8, 3, 7, 4}?
29. What is the mode of the data set {100, 101, 100, 102, 100, 103, 101, 100}?
30. The mean of 8 numbers is 35. If one number is removed, the mean of the remaining 7 numbers is 34. What is the removed number?
31. What is the mode of the data set {55, 60, 55, 65, 55, 70, 60}?
32. The median of the data set {10, 12, 15, 11, 14} is:
33. The mean of 7 numbers is 40. If one number is removed, the mean of the remaining 6 numbers is 38. What is the removed number?
34. The mode of the data set {15, 18, 20, 15, 22, 15, 18, 20} is:
35. What is the mean of the first 8 natural numbers?
36. The mode of the data set {30, 35, 30, 40, 30, 45, 35, 30} is:
37. The median of the data set {7, 10, 8, 12, 9} is:

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