About this Study Set
This study set covers Number Theory through
20 practice questions.
Fundamental concepts of number patterns, properties, and sets tailored for early learners. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 20 questions from the
Number Theory Explorers study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which of these numbers is the smallest prime number?
2
What is the name for a number that ends in 0, 2, 4, 6, or 8?
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A
Odd number
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B
Even number
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C
Prime number
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D
Square number
3
If you add two odd numbers together, what type of number is the result?
-
A
Odd
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B
Even
-
C
Prime
-
D
Negative
4
Which number is neither prime nor composite?
5
A number that has exactly two factors, 1 and itself, is called what?
-
A
Even
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B
Composite
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C
Prime
-
D
Whole
6
What is the result of multiplying any whole number by zero?
-
A
The number itself
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B
One
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C
Zero
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D
Ten
7
Which of these is a square number?
8
How many factors does the number 3 have?
9
What is the next odd number after 9?
10
Which of these is a multiple of 5?
11
What do we call numbers that can be divided by 2 without a remainder?
-
A
Even numbers
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B
Odd numbers
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C
Prime numbers
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D
Factors
12
Which number is the only even prime number?
13
What is the smallest positive integer?
14
Which of these numbers is a factor of 10?
15
An odd number added to an even number always results in what?
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A
Odd number
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B
Even number
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C
Zero
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D
Prime number
16
What is the sum of the first three prime numbers (2 + 3 + 5)?
17
How many sides does a shape have if the number of sides is a square number greater than 1?
18
Which of these is a composite number?
19
What is the first odd prime number?
20
A number that has more than two factors is called what?
-
A
Prime
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B
Composite
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C
Even
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D
Odd
