October 27th Review

What is the divisibility rule for 2?

• A number is divisible by 2 if its last digit is odd.

• The divisibility rule for 2 is that a number is divisible by 2 if its last digit is even.

• A number is divisible by 2 if it is a prime number.

• A number is divisible by 2 if its first digit is even.

What is the divisibility rule for 3?

• The divisibility rule for 3 is to add up all the digits of the number and check if the sum is divisible by 3.

• The divisibility rule for 3 is to divide the number by 3 and check if the answer is an integer.

• The divisibility rule for 3 is to subtract the sum of the digits of the number from the number itself and check if the result is divisible by 3.

• The divisibility rule for 3 is to multiply all the digits of the number and check if the product is divisible by 3.

Organize these options into the right categories

Groups:

(a) Divisible by 3

,

(b) Divisible by 4

,

(c) Divisible by 5

,

(d) Divisible by 6

• 231

• 144

• 642

• 950

What is the greatest common factor of 12 and 18?

• 2

• 6

• 3

• 9

What is the divisibility rule for 9?

• The divisibility rule for 9 is to subtract the sum of the digits of the number from 9 and check if the result is divisible by 9.

• The divisibility rule for 9 is to divide the number by 9 and check if the quotient is an integer.

• The divisibility rule for 9 is to multiply the digits of the number and check if the product is divisible by 9.

• The divisibility rule for 9 is to add up all the digits of the number and check if the sum is divisible by 9.

What is the greatest common factor of 15 and 25?

• 3

• 5

• 10

• 2

Complete your 7 times tables. 7, 14...​ (a)  

​ ​ (b)   ​ (c)   ​ (d)   ​ (e)  

• 12
• 22
• 21
• 28
• 35
• 42
• 49
• 40
• 32
• 31

Determine if 1,323 is divisible by 9 using the divisibility rule for 9.

• Yes, it is divisible

• No, it is not divisible

What is the Greatest Common Factor between 20 and 35

(a)  

What is the Greatest Common Factor of 36 and 48?

• 12

• 8

• 4

• 15