7.1 and 7.2 Factors, Divisibility, and Prime & Composite Numbers

What is the divisibility rule for 5?

• The digits must add up to 10.
• The last digit needs to be a 5 or 0.
• The last digit can only be a 5.
• The sum of the digits need to be divisible by 5.

Tags

CCSS.4.OA.B.4

Any whole number is divisible by 3 if the sum of the digits is

• greater than 3
• divisible by 3
• an even number
• an odd number

Tags

CCSS.3.OA.D.9

Composite numbers:

• Are always greater than prime numbers

• Have three or more factors

• Have exactly 2 factors

• Don't have factors

Tags

CCSS.4.OA.B.4

Which number is prime?

• 10
• 9
• 7
• 4

Tags

CCSS.4.OA.B.4

Which list has only prime numbers?

• 2, 3, 4, 5
• 1, 5, 7, 9
• 2, 3, 5, 7
• 2, 4, 6, 8

Tags

CCSS.4.OA.B.4

One is

• prime

• composite

• neither prime nor composite

• the loneliest number

Tags

CCSS.4.OA.B.4

All of the following are factor pairs of 12 EXCEPT:

• 3 and 4

• 2 and 6

• 1 and 12

• 3 and 5

Tags

CCSS.4.OA.B.4

Every number has 1 as a factor.

• True

• False

• Some but not all

Tags

CCSS.4.OA.B.4

40 is divisible by...

• 2, 5, and 10
• 2, 3, and 9
• 2, 3, and 6
• 3, 5, and 10

What multiplication expression represents the array shown here? 

• 20
• 5 x 5
• 4 x 5 

Tags

CCSS.3.OA.A.1