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What is the smallest 2 digit number that has only four factors?
10
What is the smallest 2 digit number with only 2 factors?
It is 11 which is a prime number whose factors are itself and one
Why is 2 the smallest prime number?
Starting from beginning we see that 0 has infinite factors so it is a composite number and 1 is neither prime nor composite. The next number is 2 which has only two factors so it is the smallest Prime number.
What are the first five factors of 7?
7 is a prime number. The only factors of a prime number are 1 and itself, so 7 only has two factors.
What is the smallest number that has 5 different prime factors?
To calculate this interesting number you need to use the five smallest prime numbers. A prime number is one which is not evenly divisible by any other number (except itself and 1). The first prime number is 2. then we have 3, 5, 7, 11, 13, 17 and so on. So, if you multiply 2 x 3 x 5 x 7 x 11 you'll get the smallest number with 5 different prime factors.
