IMO Practice Test — Place Value with Decimals (Thousandths)
6 Questions • 25 min • Olympiad level
25:00
Question 1 of 6
medium
A decimal rounds to 0.7 (nearest tenth). Which could it be?
0.74
0.76
0.65
0.6
Explanation: 0.74 rounds to 0.7; 0.76 rounds to 0.8.
Question 2 of 6
hard
What is the largest number with one decimal place that rounds to 3 (nearest whole)?
3.4
3.5
3.9
2.9
Explanation: 3.4 rounds to 3; 3.5 rounds up to 4.
Question 3 of 6
medium
Which decimal equals 'one and a half'?
1.2
1.5
1.05
15.0
Explanation: Half = 0.5, so one and a half = 1.5.
Question 4 of 6
hard
Order from smallest: 0.2, 0.02, 0.22, 0.022
0.02, 0.022, 0.2, 0.22
0.022, 0.02, 0.2, 0.22
0.02, 0.2, 0.022, 0.22
0.022, 0.2, 0.02, 0.22
Explanation: 0.020 < 0.022 < 0.200 < 0.220.
Question 5 of 6
hard
How many hundredths are there in 0.3?
3
30
300
0.3
Explanation: 0.3 = 0.30 = 30 hundredths.
Question 6 of 6
medium
Which is the greatest: 0.9, 0.89, 0.91, 0.099?
0.9
0.89
0.91
0.099
Explanation: 0.91 > 0.90 > 0.89 > 0.099.