prime factor, composite, even & odd (Class 6th)

Considering the prime factorization, the prime factors of 450 are

a 2 x 3 x 3 x 5 x 5

b 2 x 5 x 7

c 2 x 3 x 5 x 5

d 2 x 2 x 5

• a

• b

• c

• d

The prime factors of 70 are

a 2 x 3 x 5 x 7

b 2 x 2 x 5

c 2 x 3 x 5

d 2 x 5 x 7

• a

• b

• c

• d

Considering the prime factorization, the prime factors of 680 are

a 2 x 3 x 3 x 5 x 5

b 2 x 2 x 2 x 5 x 17

c 2 x 3 x 5 x 5

d 2 x 2 x 2 x 5 x 11

• a

• b

• c

• d

Considering the prime factorization, the prime factors of 440 are

a 2 x 5 x 7

b 2 x 3 x 5 x 5

c 2 x 2 x 2 x 5 x 11

d 2 x 3 x 3 x 5 x 5

• a

• b

• c

• d

The prime factors of 40 are

a 2 x 2 x 3 x 5 x 5

b 2 x 3 x 5 x 5

c 2 x 2 x 2 x 5

d 2 x 3 x 5

• a

• b

• c

• d

Which of the following numbers is not a factor of 68?(a) 2(b) 4(c) 17(d) 6.

• a

• b

• c

• d

What are factors?

• The top number in a fraction.
• The numbers multiplied together to make a product.
• The bottom number in a fraction.
• Angles smaller than 90 degrees.

How is a prime number different from a composite number?

• Prime numbers are smaller than composite numbers.
• Composite numbers are larger than prime numbers.
• All odd numbers are prime numbers.
• Prime numbers have only 2 factors, and composite numbers have more than 2 factors.

Which one is a composite number?

• 37
• 41
• 21
• 29

Which number below is NOT prime?

• 2
• 11
• 13
• 18