4th grade Beginning of Year Review

Is 5 prime or composite?

• prime, because it has one factor

• prime, because it has two factors

• composite, because it has three factors

• neither

Is 21 prime or composite?

• prime, because is has 2 factors

• composite, because it has 2 factors

• composite, because it has 4 factors

• neither

What is a prime number?

• a number with ONLY two factors

• a number with LESS THAN two factors

• a number with ONLY one factor

• a number with MORE THAN two factors

What is a composite number?

• a number with ONLY TWO factors

• a number with LESS THAN TWO factors

• a number with MORE THAN TWO factors

• a number with ONLY ONE factor

Which list has ONLY prime numbers?

• 1, 2, 3

• 2, 3, 5

• 2, 3, 4

• 2, 4, 6

• 22,220

• 20,100

• 20,224

• 24,202

• 6,264

• 6,344

• A

• B

• C

• D

• 491 R 1

• 473 R 2

• 496 R 5

• 487 R 2

• 521 R 3

• 520 R 4

• 522 R 5

• 523 R 2