Exploring Number Theory and Complex Numbers

Which of the following is a prime number?

• 21

• 29

• 33

• 39

Tags

CCSS.4.OA.B.4

What is the greatest common divisor (gcd) of 84 and 120?

• 6

• 12

• 24

• 36

Which of the following numbers is a perfect square?

• 45

• 64

• 72

• 90

Tags

CCSS.8.EE.A.2

Which of the following is not a rational number?

What is the least common multiple (LCM) of 8 and 12?

• 24

• 36

• 48

• 96

Which of the following statements is true?

• Every prime number is odd.

• Every even number is composite.

• 2 is the only even prime number.

• 1 is a prime number.

Tags

CCSS.4.OA.B.4

Tags

CCSS.3.OA.D.9

Which of the following numbers is divisible by 9?

• 123

• 234

• 333

• 729

Tags

CCSS.4.OA.B.4

Tags

CCSS.4.OA.B.4