IMO Practice Test — Introduction to Algebraic Thinking
6 Questions • 15 min • Olympiad level
15:00
Question 1 of 6
Find the missing number: 7 + 8 = 10 + ___
3
4
5
6
Explanation: Left=15, so 10+5=15
Question 2 of 6
Which makes the equation true? 14 – 5 = ___ – 3
12
13
14
15
Explanation: Left=9, so 12-3=9
Question 3 of 6
If 3 + 5 = 8 and 8 = 4 + 4, then 3 + 5 = 4 + 4. This is an example of:
Addition
Subtraction
Equality
Transitive property
Explanation: If a=b and b=c, then a=c (transitive property)
Question 4 of 6
Fill in the blank: 16 – 7 ___ 5 + 4
>
<
=
+
Explanation: Left=9, Right=9, so equal
Question 5 of 6
Complete the pattern: 2, 4, 6, ___, 10
7
8
9
11
Explanation: Add 2 each time: 6+2=8
Question 6 of 6
Which number makes this true? 5 + ___ = 3 + 9
5
6
7
8
Explanation: Right=12, so 5+7=12