Divisibility and Prime Factorization

Find the prime factorization of 75 in exponential form.

• 3 × 5²

• 3² × 5

• 5 × 15

• 3² × 5²

Which number is divisible by both 2 and 5?

• 150

• 151

• 152

• 153

Which of the following numbers is divisible by 9?

• 234

• 235

• 236

• 237

Is the number 231 divisible by 3?

• Yes

• No

Which of the following statements is true of this number?

• It is divisible by 2, 5 and 10

• It is divisible by 10

• It is divisible by 2, 3, 5, 6, 9, and 10

• It is divisible by 3 and 5

Which of the following is divisible by 8?

• 248

• 889

• 118

• 138

Which of the following is the prime factorization of 56?

• 2 x 2 x 2 x 8

• 2 x 2 x 2 x 7

• 8 x 7

• 2 x 4 x 7

Which of these are NOT factors of 60?

• 4 and 15

• 2 and 30

• 10 and 6

• 12 and 8

Given the number 247_,what digit can you place in the box so that the number formed is divisible by 9 ?

• 3

• 0

• 5

• 2

Which is a prime number?

• 49

• 51

• 31

• 91