IMO Practice Test — Perimeter & Area
6 Questions • 25 min • Olympiad level
25:00
Question 1 of 6
hard
If you double both sides of a square, its area becomes…
double
triple
four times
the same
Explanation: Side × 2 → area × (2 × 2) = 4 times.
Question 2 of 6
hard
A square has perimeter 48 cm. Its side is…
8 cm
12 cm
16 cm
6 cm
Explanation: 48 ÷ 4 = 12 cm.
Question 3 of 6
medium
A garden is an 8 × 5 rectangle with a 2 × 2 pond removed. Grass area?
36
40
44
16
Explanation: 40 − 4 = 36 square units.
Question 4 of 6
hard
A 7 × 7 square has a 3 × 3 square removed from a corner. Remaining area?
40
49
9
46
Explanation: 49 − 9 = 40 square units.
Question 5 of 6
medium
A rectangle is 12 cm by 5 cm. Its perimeter is…
17 cm
34 cm
60 cm
24 cm
Explanation: 2 × (12 + 5) = 34 cm.
Question 6 of 6
medium
Tiles of 1 m² cover a 5 m × 4 m floor. How many tiles are needed?
9
18
20
40
Explanation: Area = 5 × 4 = 20 tiles.