# Does any number that has 10 as a factor also have 5 as a factor?

Correct. 5 and 2 are factors of 10, and will be factors of any number having10 as a factor.

# Do all numbers that have 5 as a factor also have 2 as a factor?

Not All To find out if all numbers that have 5 as a factor have 2 as a factor, you can list the multiples of each. 5's multiples are 5, 10, 15, 20... 2's multiples are… 2, 4, 6, 8, 10, 12, 14, 16, 18, 20... 5 and 15 are multiples of 5, but not 2, so all numbers that have 5 as a factor DO NOT have 2 as a factor. It is not really necessary to write that all out because the fact that 5 is an odd number and 2 is only a factor of even numbers indicates that all numbers that have 5 as a factor would not have 2 as a factor. Only the multiples of 5 that are even have 2 as a factor also.

# All numbers that have 16 as a factor also have 2 as a factor?

Yes, that is true.

# What are all the numbers that have 5 and 8 as factors?

An easy way to figure out many of them would to be to multiply 8x5(40). Now, any numbers that are multiples of 40, such as 40,80,120,160, would all have the factors of 8 and 5….

# All numbers that have 12 as a factor also have 2 as a factor?

Yes, because 2 is a factor of 12.

# Does all numbers with a factor with 5 also have a factor of 2?

No. 15 has a factor of 15 but not a factor of 2.

# Does any number that has 10 also have 5 as a factor?

Yes, any number that has 10 as a factor also has 5 as a factor

# What number is also the sum of all its proper factors?

6 = (1+2+3) 6 = (1x2x3)

# What number is also the sum of all it's proper factor?

A perfect number, like 6.

Answered

# Do all numbers that have 18 as a factor also have 3 as a factor?

Yes, since 3 is a factor of 18, 3 will also be a factor of any multiple of 18.

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# Do all numbers that have 5 as the factor also has 2 as a factor?

No.

Answered

# What are All the factors of the number 5?

1 and 5