IMO Practice Test — Counting Numbers
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
medium
Priya counts by 2s from 0. Which list?
0,1,2,3,4
0,2,4,6,8
1,3,5,7,9
2,3,4,5,6
Explanation: Skip counting by 2s from 0: 0,2,4,6,8
Question 2 of 6
hard
Jar has 50 candies. Raj adds 3 sets of 10. How many now?
53
60
70
80
Explanation: 50 + 30 = 80
Question 3 of 6
medium
95, ___, 105. Missing number?
98
100
101
102
Explanation: Counting by 5s: 100
Question 4 of 6
medium
Pattern: 120, 110, 100, ___?
90
95
105
115
Explanation: Decreasing by 10: 90
Question 5 of 6
medium
Mia has 7 bags of 10 beads. Total beads?
17
60
70
80
Explanation: 7 x 10 = 70
Question 6 of 6
hard
Number is 10 more than 190. Also 5 less than ___?
200
205
210
215
Explanation: 190+10=200; 200+5=205