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Maths Quiz for Class 7 Data Handling |
In this post, you will find 20 online maths quiz questions
for class 7 data handling. Online maths quiz will take around 20 minutes or
less to complete it.
Question 1: Five students of a class are asked about their favourite sports and their answers are as follows: cricket, football, hockey, cricket, cricket. Which type of data is this?
A) secondary data
B) arrayed data
C) primary data
D) organised data
Explanation: This data is a primary data.
Question 2: Find the range of the following data: 34, 286, 120, 27, 384, 276, 98, 175, 10, 68
A) 374
B) 10
C) 384
D) 276
Explanation: Range = The largest observation – smallest observation = 384 – 10 = 374
Question 3: Find the arithmetic mean of the following data: 12, 67, 42, 38, 29, 48, 54, 25
A) 39.25
B) 39.5
C) 38.25
D) 39
Explanation: Arithmetic mean = Sum of observations ÷ Number of observations = (12 + 67 + 42 + 38 + 29 + 47 + 54 + 25)/8 = 314/8 = 39.25
Question 4: Rohan obtained the following marks in 5 subjects of class X: 78, 95, 72, 85, 90. Find the average of his marks.
A) 80
B) 84
C) 82
D) 86
Explanation: Average = Sum of marks ÷ Number of subjects = (78 + 95 + 72 + 85 + 90)/5 = 420/5 = 84
Question 5: Find the median of the following data: 24, 14, 28, 35, 29, 18, 23, 31, 36
A) 24
B) 28
C) 29
D) 31
Explanation: Arranging the data in ascending order, we get: 14, 18, 23, 24, 28, 29, 31, 35, 36. Here, n = 9 (odd). Median = (9 + 1)/2 = 5th term = 28
Question 6: Find the median of the following observations: 13, 9, 17, 8, 25, 12, 27, 22
A) 13
B) 17
C) 15
D) 16
Explanation: Arranging the data in ascending order, we get: 8, 9, 12, 13, 17, 22, 25, 27. Here, n = 8 (even). n/2 = 4 and n/2 + 1 = 5 Median = Mean of 4th and 5th term = (13 + 17)/2 = 30/2 = 15
Question 7: Find the mode of the following data: 43, 56, 49, 12, 34, 56, 52, 34, 59, 49, 18, 34
A) 56
B) 34
C) 52
D) 43
Explanation: The observation which occurs the greatest number of times in a data set, is called the mode. Here, 34 is the mode.
Question 8: A die is rolled 10 times and the outcomes are as follows: 2, 5, 1, 6, 2, 5, 4, 3, 5, 1. Find the mode of these outcomes.
A) 1
B) 2
C) 6
D) 5
Explanation: The outcome 5 occurs three times, therefore, the mode is 5.
Question 9: The distance travelled by a car in 7 days is as follows: 185 km, 109 km, 123 km, 95 km, 101 km, 150 km, 105 km. Find the mean distance travelled by the car.
A) 124 km
B) 101 km
C) 105 km
D) 109 km
Explanation: Mean distance = (185 km + 109 km + 123 km + 95 km + 101 km + 150 km + 105 km)/7 = 868/7 = 124 km
Question 10: The mean of first 8 natural numbers is _____________.
A) 3.5
B) 4
C) 4.5
D) 5
Explanation: The first 8 natural numbers are 1, 2, 3, 4, 5, 6, 7, 8. Mean = (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8)/8 = 36/8 = 4.5
Question 11: The mean of first 10 whole numbers is _______________.
A) 4
B) 4.5
C) 5
D) 5.5
Explanation: The first 10 whole numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. Mean = (0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9)/10 = 45/10 = 4.5
Question 12: The shoe sizes of 20 students of a group are as follows: 3, 3, 4, 5, 6, 4, 6, 3, 6, 4, 4, 5, 5, 4, 3, 3, 5, 4, 6, 3. Find the mode of the information.
A) 4
B) 3
C) 5
D) 6
Explanation: In the given information, 3 occurs the greatest number of times. Therefore, the mode is 3.
Question 13: The heights of 7 students are as follows: 120 cm, 108 cm, 132 cm, 123 cm, 112 cm, 119 cm, 126 cm. Find the median of this data.
A) 120 cm
B) 123 cm
C) 119 cm
D) 112 cm
Explanation: Arranging the given heights in ascending order, we get: 108 cm, 112 cm, 119 cm, 120 cm, 123 cm, 126 cm, 132 cm. Here, n = 7 (odd). Median = (7 + 1)/2 term = 4th term = 120 cm
Question 14: The ages of 15 contestants of a television reality show are as follows: 23, 19, 21, 20, 19, 23, 20, 19, 21, 22, 22, 21, 19, 20, 22. Find the mode of this data.
A) 22
B) 21
C) 20
D) 19
Explanation: In the given ages, 19 occurs the greatest number of times, therefore, the mode is 19.
Question 15: The following data gives the time (in hours) spent by 10 students watching television every day: 4, 5, 1, 2, 4, 2, 4, 3, 1, 2. Find the median of this data.
A) 1 hours
B) 2 hours
C) 2.5 hours
D) 3 hours
Explanation: Arranging the given data in ascending order, we get: 1, 1, 2, 2, 2, 3, 4, 4, 4, 5. Here, n = 10 (even). Median = Mean of 5th and 6th terms = (2 + 3)/2 = 5/2 = 2.5 hours
Question 16: The following bar graph represents the number of refrigerators sold in a week in an electronic store. On which day, the greatest number of refrigerators were sold?
A) Monday
B) Sunday
C) Wednesday
D) Saturday
Explanation: On Sunday, the greatest number of refrigerators were sold.
Question 17: Refer the bar graph given in question 16. On which day, the least number of refrigerators were sold?
A) Thursday
B) Friday
C) Saturday
D) Tuesday
Explanation: On Thursday, the least number of refrigerators were sold.
Question 18: Refer the bar graph given in question 16. On which day, 9 refrigerators were sold?
A) Sunday
B) Tuesday
C) Monday
D) Wednesday
Explanation: On Monday, 9 refrigerators were sold.
Question 19: Refer the bar graph given in question 16. How many refrigerators were sold on Wednesday?
A) 9
B) 10
C) 11
D) 12
Explanation: Ten refrigerators were sold on Wednesday.
Question 20: Refer the bar graph given in question 16. How many refrigerators were sold in that week?
A) 45
B) 50
C) 55
D) 60
Explanation: Number of refrigerators sold on Monday = 9, Tuesday = 6, Wednesday = 10, Thursday = 5, Friday = 6, Saturday = 7, Sunday = 12. Total number of refrigerators sold in the week = 9 + 6 + 10 + 5 + 6 + 7 + 12 = 55
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