A Carroll Diagram is a diagram used to sort objects and numbers, based on certain properties.
Carroll diagram is named after famous author Lewis Carroll (alias name of Charles Lutwidge Dodgson).
By using the attributes Prime and Not prime, the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9 can be represented by Carroll diagram as:


A. Figure 1
B. Figure 2
C. Figure 3
D. Figure 4
Correct Answer: C
Step 1: Write the factors for each number.
18: 1, 2, 3, 6, 9, 18
20: 1, 2, 4, 5, 10, 20
Step 2: The factors of 18 with attribute 'even' is 2, 6, and 18.
Step 3: The factors of 18 with attribute 'odd' is 1, 3, and 9.
Step 4: The factors of 20 with attribute 'even' is 2, 4, 10, and 20.
Step 5: The factors of 20 with attribute 'odd' is 1 and 5.
Step 6: The 'even' and 'odd' attributes are correctly given in Figure 3.
Step 7: So, Figure 3 is the Carroll diagram for the factors of 18 and 20.
Q1: Which of the following numbers is a prime number?
Q2: Which of the following numbers is an even number?
Q: What is the purpose of a Carroll Diagram?
A: To sort objects and numbers according to whether they have specific properties.
Q: How is a Carroll Diagram different from a Venn Diagram?
A: A Carroll Diagram sorts items based on 'yes' or 'no' attributes, while a Venn Diagram shows relationships and overlaps between different sets.