IMO Practice Test — Line Plots & Mean
6 Questions • 25 min • Olympiad level
25:00
Question 1 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 2 of 6
hard
For the numbers 4, 4, 4, the mean, median and mode are all…
3
4
12
0
Explanation: Every measure equals 4.
Question 3 of 6
hard
Plot Xs: value 2 → 1, value 4 → 1, value 6 → 1. The median is…
2
4
6
12
Explanation: Ordered data 2, 4, 6 — the middle is 4.
Question 4 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.
Question 5 of 6
medium
The mode of 2, 2, 4, 4, 4 is…
2
4
6
3
Explanation: 4 appears three times.
Question 6 of 6
medium
The mean of 0, 5, 10 is…
0
5
10
15
Explanation: 15 ÷ 3 = 5.