IMO Practice Test — Money
6 Questions • 12 min • Olympiad level
12:00
Question 1 of 6
hard
What is the fewest coins to make ₹8 using ₹5, ₹2, ₹1 coins?
2 coins
3 coins
4 coins
5 coins
Explanation: ₹5 + ₹2 + ₹1 = ₹8 using 3 coins.
Question 2 of 6
hard
3 chocolates cost ₹10 each. You pay ₹50. Change?
₹10
₹20
₹30
₹15
Explanation: 3 × 10 = 30; 50 − 30 = 20.
Question 3 of 6
medium
How many ₹2 coins make ₹20?
5
10
20
2
Explanation: 20 ÷ 2 = 10 coins.
Question 4 of 6
hard
Which is worth more: four ₹5 coins or one ₹20 note?
four ₹5 coins
one ₹20 note
Equal
Cannot tell
Explanation: 4 × 5 = 20 = 20, they are equal.
Question 5 of 6
hard
A toy is ₹45. You have three ₹20 notes. Can you buy it?
No
Yes, with ₹15 left
Yes, with ₹5 left
Exactly enough
Explanation: 3 × 20 = 60; 60 − 45 = 15 left.
Question 6 of 6
hard
₹1 = how many 25-paise coins?
2
4
5
10
Explanation: 4 × 25 = 100 paise = ₹1.