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.
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The mean of the first five natural numbers is:
- 2
- 3
- 4
- 5
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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.
The heights of 7 children in centimeters are: 120, 125, 122, 130, 125, 128, 125. What is the mode of their heights?
- 120
- 122
- 125
- 130
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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.
In a class, the scores of 7 students in a test are 55, 60, 65, 55, 70, 65, 55. What is the median score?
- 55
- 60
- 65
- 70
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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.
The mode of the data set {50, 60, 70, 60, 80, 90, 60, 70} is:
- 50
- 60
- 70
- 80
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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.
The marks of 9 students in a Science quiz are: 8, 9, 7, 9, 8, 10, 9, 7, 9. What is the median mark?
- 8
- 9
- 7
- 10
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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.