IMO Practice Test — Decimal Operations
6 Questions • 25 min • Olympiad level
25:00
Question 1 of 6
hard
₹100 − ₹37.50 = ?
₹62.50
₹63.50
₹72.50
₹52.50
Explanation: 100.00 − 37.50 = 62.50.
Question 2 of 6
medium
0.005 × 1000 = ?
5
50
0.5
500
Explanation: Three places right → 5.
Question 3 of 6
medium
₹2.50 × 4 = ?
₹8.00
₹10.00
₹9.00
₹6.00
Explanation: 2.50 × 4 = 10.00.
Question 4 of 6
hard
0.125 × 8 = ?
1.0
0.8
8.0
1.25
Explanation: 0.125 × 8 = 1.0 (one-eighth × 8).
Question 5 of 6
hard
25 ÷ 1000 = ?
0.25
0.025
2.5
0.0025
Explanation: Three places left → 0.025.
Question 6 of 6
medium
0.25 + 0.25 + 0.25 + 0.25 = ?
1.0
0.8
1.25
0.5
Explanation: Four quarters make one whole.