IMO Practice Test — Line Plots & Mean
6 Questions • 25 min • Olympiad level
25:00
Question 1 of 6
medium
The median of 5, 1, 3, 9, 7 is…
3
5
7
9
Explanation: In order: 1, 3, 5, 7, 9 — the middle is 5.
Question 2 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 3 of 6
hard
The mean of 12, 15, 18 is…
13
15
18
45
Explanation: 45 ÷ 3 = 15.
Question 4 of 6
medium
The mean of 0, 5, 10 is…
0
5
10
15
Explanation: 15 ÷ 3 = 5.
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
hard
Plot Xs: value 1 → 1, value 2 → 2, value 3 → 1. The mean of the data is…
1.5
2
2.5
3
Explanation: Data: 1, 2, 2, 3 → sum 8 ÷ 4 = 2.