IMO Practice Test — Line Plots & Mean
6 Questions • 25 min • Olympiad level
25:00
Question 1 of 6
medium
The mode of 2, 2, 4, 4, 4 is…
2
4
6
3
Explanation: 4 appears three times.
Question 2 of 6
hard
The mean of 4 numbers is 5. Their total is…
9
20
5
25
Explanation: Total = mean × count = 5 × 4 = 20.
Question 3 of 6
medium
A plot has 4 Xs above 10. The mean of those data points is…
4
10
40
14
Explanation: All four values are 10, so the mean is 10.
Question 4 of 6
medium
To find the mean, add the numbers and then…
divide by how many there are
multiply them
subtract the smallest
add 1
Explanation: Mean = total ÷ count.
Question 5 of 6
hard
The median of 3, 8, 1, 6, 5 is…
3
5
6
8
Explanation: In order: 1, 3, 5, 6, 8 — the middle is 5.
Question 6 of 6
medium
A plot has 3 Xs above 2 and 1 X above 5. The total of all the data values is…
6
11
7
8
Explanation: 3 × 2 + 1 × 5 = 6 + 5 = 11.