IMO Practice Test: Collecting and Organising Data | Class 1 Mathematics

Question 1 of 6

A class collected data on eye colour: Brown: 12, Blue: 8, Green: 5, Black: 10. How many fewer children have brown eyes than the sum of green and black eyes?

3 fewer

3 more

2 fewer

2 more

Explanation: Green + Black = 5 + 10 = 15. Brown = 12. Difference = 15 - 12 = 3. So, brown eyes are 3 fewer.

Question 2 of 6

Tally marks are recorded for 5 days: Mon:5, Tue:7, Wed:4, Thu:9, Fri:6. What is the total of the two days with the highest and lowest values?

13

14

15

16

Explanation: Highest = Thursday = 9. Lowest = Wednesday = 4. Total = 9 + 4 = 13.

Question 3 of 6

A picture graph shows fruit sales. Key: 🍎 = 5 fruits. Apples: 4 🍎, Bananas: 3 🍎, Oranges: 2 🍎, Grapes: 1 🍎. How many total fruits were sold? If oranges sold double, how many oranges would there be then?

40, 15

45, 20

50, 10

50, 20

Explanation: Apples = 20, Bananas = 15, Oranges = 10, Grapes = 5. Total = 20 + 15 + 10 + 5 = 50. Double of oranges = 20.

Question 4 of 6

A table shows: Monday-8, Tuesday-5, Wednesday-7, Thursday-?, Friday-6. The total for the week is 35. Find Thursday’s value. Also find how much greater Thursday is than the average of the other four days.

9, 2.5

9, 3

8, 2

8, 2.5

Explanation: Sum of known days = 8 + 5 + 7 + 6 = 26. Thursday = 35 - 26 = 9. Average of other four days = 26 ÷ 4 = 6.5. Difference = 9 - 6.5 = 2.5.

Question 5 of 6

A survey asked students for their favourite colour. The tally marks were: Red: ~~

~~

Explanation: , Blue: ~~

Question 6 of 6

Two classes collected data on favourite pet. Class A: Dog(8), Cat(6), Fish(4). Class B: Dog(5), Cat(9), Fish(2). If each class has 18 students, what is the total number of students who chose Cat? How many more students chose Cat in Class B than in Class A?

15, 3

14, 4

15, 4

14, 3

Explanation: Total choosing Cat = 6 + 9 = 15. Difference = 9 - 6 = 3.

IMO Practice Test — Collecting and Organising Data