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Common factors:

There can be several common factors, but there is only one Greatest Common factor.

Write 36 and 90 as the product of their prime factors.

As for all the common factors, it is probably easiest to write all the factors of 36 and then select which are factors of 90 as well.

Factors of 36:

Factors of 90

Common factors:

Featured 5 days ago

**25/3 oz or 8.33 oz**

(2/5) of a jar of peanut butter needs

1 full jar of peanut butter will require

= **25/3 oz = 8.33 oz**

Featured 5 days ago

**47** is a positive integer and has no factors other than 1 and itself; hence a **prime number and not composite**.

A composite number is a positive integer which is not prime (I.e. which has factors other than one and itself). 47 has no factors other than 1 and itself, and hence a **prime number and not composite**.

Featured 3 days ago

See a solution process below:

1 dozen is 12, therefore 3 dozen is

We can write the correlation:

Multiply each side of the equation by

The answer is: b. 6 and 3 fourths tsp

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B

Given:

8 jumbo blueberry muffins need 1.5 tsp of baking powder

3 dozen (36 pcs) need how many tsp of baking powder?

Another way of looking at this is ratio and proportion.

Let x = amount of baking powder needed for 3 dozen

Featured 3 days ago

See a solution process below:

First, convert each number of yards from mixed numbers to improper fractions:

**Needs: **

**Has:**

To find out how much more fabric Sarah needs we can subtract how much Sarah has from how much total fabric Sarah needs:

To add or subtract fractions the must be over a common denominator. We can multiply the fraction on the left by the appropriate form of

We can now subtract the numerators over the common denominator:

Sarah needs

Featured 3 days ago

78

To the find the LCM factor both number and use each unique factor only once

The unique factors are 2, 3 and 13 so the LCM is

Featured 3 days ago

another way is to simply list the multiples of the numbers and pick out the common ones

multiples of

multiples of

common multiples:

Featured 3 days ago

G C F **18**

It’s also called Greatest Common Divisor **G C D**

To find G C F of 36, 90:

First write the factors of both terms :

Factors of

Factors of

Select the common factors in both terms as marked redabove.

**18** is the G C F

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Another way is to list the factors and then pick out the common ones.

factors of

factors of

common factors