IMO Practice Test — Number Recognition
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
medium
Which number has 3 tens and 7 ones?
73
37
307
730
Explanation: 3 tens + 7 ones = 37
Question 2 of 6
medium
Correct spelling of 90?
Ninety
Ninty
Nienty
Ninet
Explanation: 90 = Ninety
Question 3 of 6
hard
Two-digit number: 5 in tens place and even ones digit. Which?
51
53
54
57
Explanation: 54: tens=5 ones=4 (even)
Question 4 of 6
easy
Four tens and zero ones = ?
4
14
40
400
Explanation: 40
Question 5 of 6
easy
Number just before one hundred?
98
99
100
101
Explanation: 99
Question 6 of 6
hard
Arrange smallest to largest: 87,78,98,89
78,87,89,98
78,89,87,98
87,78,89,98
98,89,87,78
Explanation: 78 < 87 < 89 < 98