4th Grade
Unit 4 Common Assessment #1 Answer Key
4.0A.4
1. Mr. Thomas is Jamal’s math teacher. During class, Mr. Thomas
asked if the number 8 is a prime number or a composite number.
How should Jamal answer Mr. Thomas’ question?
a.
b.
c.
d.
8 is a prime number.
8 is a composite number.
8 is neither a prime nor a composite number.
8 is both a prime and a composite number.
2. In math game, Suzy reads four statements about the number 41.
She has to pick a true statement to win the game. Which statement
should Suzy choose?
a.
b.
c.
d.
41 is divisible by 2.
41 is divisible by 3.
41 is divisible by 5.
41 is a prime number.
3. Elaine realized that she can get the answer of 10 by:
 Multiplying 10 x1 or 1 x 10.
 Multiplying 5 x 2 or 2 x 5.
From this, what can Elaine conclude about the number 10?
a.
b.
c.
d.
10 is a prime number.
10 is a composite number.
10 is neither prime nor composite.
10 is both prime and composite.
4. Maria’s teacher explains that a composite number is divisible by more
than 1 and itself. He lists the following numbers on the board:
30
11
19
23
Which number should Maria choose if she was asked to pick a
composite number?
a.
b.
c.
d.
23
11
19
30
5. Samantha’s teacher explains that a prime number is only divisible by
itself or the number 1. She lists the following numbers on the board:
22
42
29
36
Which number should Samantha choose if she was asked to pick a
prime number?
a.
b.
c.
d.
22
42
29
36
Assessment #1
Cluster 4.OA.4 – Questions: (factor pairs of whole numbers within 100)
# Correct
Performance Score
Percentage Score
5
4
100%
4
2
80%
3
1
60%
2
1
40%
1
1
20%