IMO Practice Test — Introduction to Algebraic Thinking
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
hard
Rule: multiply by 2. Start at 3. 4th term?
9
12
24
48
Explanation: 3,6,12,24
Question 2 of 6
medium
Star + Star = 18. What is Star?
6
8
9
12
Explanation: 2 x Star = 18; Star = 9
Question 3 of 6
medium
Shop sells 5 pens more than pencils. Pencils=P. Pens=?
P-5
P+5
5P
5/P
Explanation: Pens = P + 5
Question 4 of 6
hard
4 x ___ + 2 = 22. Missing number?
4
5
6
7
Explanation: 4x5+2=22
Question 5 of 6
hard
Rule: 2 to 6 3 to 9 5 to 15. 7 to ___?
17
19
21
23
Explanation: Rule is x3: 7x3=21
Question 6 of 6
medium
Circle=4 Square=7. Circle+Square+Circle=?
11
13
15
18
Explanation: 4+7+4=15