About this Study Set
This study set covers Number Theory through
25 practice questions.
A collection of foundational questions covering basic arithmetic properties, number types, and sequences. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 25 questions from the
Elementary Number Theory Fundamentals study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which of the following numbers is an even number?
2
What is the smallest prime number?
3
Which of these numbers is a multiple of 5?
4
A number that has only two factors, 1 and itself, is called a:
-
A
Composite number
-
B
Prime number
-
C
Odd number
-
D
Square number
5
What is the result of multiplying any whole number by 0?
-
A
The number itself
-
B
1
-
C
0
-
D
The number plus 1
6
Which of these is a composite number?
7
What is the next number in the sequence 2, 4, 6, 8, ...?
8
Which number is a factor of 12?
9
What do you call numbers that end in 1, 3, 5, 7, or 9?
-
A
Even
-
B
Prime
-
C
Odd
-
D
Composite
10
Which of these numbers is a square number?
11
What is the sum of 15 and 0?
12
Which number is neither prime nor composite?
13
What is the product of 3 and 4?
14
Which number is a multiple of 10?
15
An even number added to an even number always results in:
-
A
An odd number
-
B
An even number
-
C
A prime number
-
D
A negative number
16
Which of these is the largest single-digit prime number?
17
If you divide 20 by 4, what is the quotient?
18
Which digit is in the units place of 47?
19
A number that can be divided by 2 without a remainder is:
-
A
Odd
-
B
Even
-
C
Prime
-
D
Composite
20
What is the first square number after 1?
21
How many factors does the number 7 have?
22
Which number is a common factor of 6 and 9?
23
Every even number greater than 2 is:
-
A
Prime
-
B
Composite
-
C
Odd
-
D
A multiple of 5
24
What is 2 multiplied by itself?
25
Which of these is an odd number?
