IMO Practice Test — Multiplication Facts (1-10)
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
hard
Which is larger: 8 x 9 or 7 x 10?
8 x 9 (=72)
7 x 10 (=70)
They are equal
Cannot tell
Explanation: 8 x 9 = 72. 7 x 10 = 70. 72 > 70, so 8 x 9 is larger.
Question 2 of 6
hard
If 6 x a = 54, what is a x 3?
18
24
27
36
Explanation: 6 x a = 54 means a = 9. So a x 3 = 9 x 3 = 27.
Question 3 of 6
hard
9 x 9 - 8 x 8 = ?
1
15
17
19
Explanation: 9 x 9 = 81. 8 x 8 = 64. 81 - 64 = 17.
Question 4 of 6
hard
A rectangular array has 7 rows and 8 columns. How many dots total?
48
54
56
63
Explanation: Rows x Columns = 7 x 8 = 56 dots.
Question 5 of 6
hard
How many factors does 24 have?
4
6
8
10
Explanation: Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24 = 8 factors.
Question 6 of 6
hard
Which product is a perfect square: 3x12, 4x9, 5x8, 6x7?
3x12=36
4x9=36
Both A and B
5x8=40
Explanation: 3x12=36=6x6 and 4x9=36=6x6. Both equal 36, which is a perfect square.