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Earn +20 ptsQ: What numbers have 2 as their only prime factor?
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Prime numbers of 128?
The only prime factor of 128 is 2.
What is the HCF prime factor of 48 64 and 80?
The only prime factor these numbers share is 2. It is the only prime factor of 64, which is 2 to the 6th power. The hcf is 16, but that is not a prime.
Which factors of 64 are prime numbers?
The only prime factor of 64 is 2.
How many prime numbers are even numbers?
There is only one even prime number: 2. All other even numbers have 2 as a factor, in addition to 1 and themselves, so they cannot be prime numbers.
How many even prime numbers are there and why?
There is only one even prime number, and that is 2. The reason is that all even numbers greater than 2 have 2 as a factor.
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