Number Theory

The number "1" is

• Prime

• Composite

• Neither

Tags

CCSS.4.OA.B.4

Which of the following numbers is prime?

• $39$

• $108$

• $98$

• 
  

  $79$
  

Tags

CCSS.4.OA.B.4

The prime factorization of 104 is

• $2+2+2+13$

• $2\times2\times2\times13$

• $2\times2\times1\times3$

• $2\times2\times2\times3\times1$

Tags

CCSS.4.OA.B.4

What number is represented by the prime factorization  $2\times3\times3\times7?$  

•  $120$  

•  $1260$  

•  $126$  

•  $180$  

Tags

CCSS.4.NBT.B.5

CCSS.4.OA.B.4

The GCF of 24 and 116 is

•  $3$  

•  $29$  

•  $8$  

• 
  

   $4$  
  

Tags

CCSS.4.OA.B.4

The GCF of 72 and 90 is

• $18$

• $9$

• $2$

• $10$

Tags

CCSS.4.OA.B.4

Find the LCM of 7 and 6

•  $42$  

• $6$

• $14$

• $21$

Tags

CCSS.6.NS.B.4

Find the LCM of 4 and 12 

• $24$

• $48$

•  $12$  

• $36$

Tags

CCSS.4.OA.B.4

All of the following are equivalent fractions except...

• 4/6
• 1/2
• 2/4
• 4/8

Tags

CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What does the denominator represent?

• the total number of pieces 
• the top number
• the focus or part

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B