Nine is a factor of which of the following numbers?

• 427

• 558

• 599

How do you tell if a number is divisible by 2?

• The ones digit is odd.

• The ones digit is even.

• The ones digit is 0 or 5.

• The sum of all the digits is divisible by 2.

How do you tell if a number is divisible by 3?

• The ones digit is odd.

• The ones digit is even.

• The sum of the digits is divisible by 3.

• The sum of all the digits is divisible by 2.

Which of the following is not a multiple of 4?

• 68

• 92

• 132

• 178

Which of the following numbers is prime?

• 137

• 115

• 93

• 69

Which of the following is composite?

• 43

• 53

• 63

• 73

Find the missing number.

 $\frac{4}{9\ }=\frac{n}{36}$  

• 9

• 12

• 16

• 20

What is the name of the geometric figure

A decagon has _____ sides.

• 6

• 12

• 10

• 8

What is the name of a polygon with 8 sides?

• decagon

• octagon

• triangle

• hepatagon