About this Study Set
This study set covers Number Theory through
25 practice questions.
A collection of easy, fact-based multiple-choice questions covering fundamental concepts in number theory, aligned with elementary school curricula. 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 Basics 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 number is a factor of every whole number?
4
What is the next number in the sequence: 2, 4, 6, 8, ...?
5
A number that is not even is called:
-
A
Prime
-
B
Composite
-
C
Odd
-
D
Factor
6
Which of these is a multiple of 3?
7
How many factors does the number 6 have?
8
Which number is divisible by 5 without any remainder?
9
Which of the following is a prime number?
10
What is the sum of the first two odd numbers (1 and 3)?
11
Which number is the result of 7 multiplied by 3?
12
Which number is the smallest multiple of 4?
13
How can you tell if a number is odd?
-
A
It ends in 0 or 2
-
B
It ends in 1, 3, 5, 7, or 9
-
C
It is divisible by 2
-
D
It has only two factors
14
Which of the following is a factor of 12?
15
What is the number that comes immediately after 99?
16
Which number is NOT a prime number?
17
What is the largest single-digit even number?
18
Which number is a multiple of both 2 and 3?
19
If you divide 10 by 2, what is the remainder?
20
Which of the following numbers has exactly two factors: 1 and itself?
21
What is the product of 5 and 5?
22
Which number is divisible by 10?
23
Which of the following numbers is an odd number?
24
What is the smallest number that has 3 as a factor?
25
Which number is a factor of 18?
