What is the greatest common factor of 64, 4 and 5?

The greatest common factor (GCF) is the largest number that divides exactly into two or more numbers.

Here are the steps to find the GCF of 64, 4, and 5:

Step 1: List the prime factors of each number.

• The prime factors of 64 are 2 x 2 x 2 x 2 x 2 x 2.
• The prime factors of 4 are 2 x 2.
• The prime factors of 5 are 5.

Step 2: Identify the common prime factors.

• The common prime factors of 64 and 4 are 2 x 2.
• There are no common prime factors between 64 and 5, or 4 and 5.

Step 3: Multiply the common prime factors.

• The GCF is 2 x 2 = 4.

So, the greatest common factor of 64, 4, and 5 is 4.