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Q: How many three digit numbers have odd prime number as 1st digit A prime number as 2nd digit and an odd number as 3rd digit?

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The smallest three-digit number divisible by the first three prime numbers (2, 3, and 5) and the first three composite numbers (4, 6, and 8) is 120.

102.

120

Any prime numbers of about 66 or 67 digits will do.

The first 'three digit' Prime Number is 101.

There is no three digit prime number whose square root is a prime number. Prime numbers have no factors other than 1 and themselves. Any number having a prime number as a square root is a composite number.

The smallest three digit prime number is 101.

An emirp number is a prime number which, when you reverse the digits, produces a different prime number. Therefore, there are no single-digit emirp numbers. The first three emirp numbers are: 13, 17, 31

Using prime factorization, there are 2 three digit numbers with 9 factors: 512 and 768. There are no three digit numbers with 10 or more prime factors. 512=2^9 and 768=3*2^8

997 is the last 3 digit prime number

It doesn't matter if you know that the largest three-digit prime number is 997 or that its cube root is 9.98998998. If you include zero in the whole numbers, the answer will be zero.

Some numbers that you can get when you reverse the digits and they are still prime numbers are: 403 ÷ 13 = 31 2,701 ÷ 37 = 73 1,207 ÷ 17 = 71

non-prime no.

smallest 3-digit prime is 101. 100 is not a prime number (very obviously)

999.

The largest three digit prime number whose digits are all primes is 773.

-998 = if its negative number 100 = if its positive numbers

101 is the first three-digit prime number.

If you're asking about distinct prime factors, there are eight numbers tied with three of them. If not, 64 has six twos.

2 x 7 x 71 = 994

The only numbers which have exactly three factors are perfect squares of prime numbers. That only gives us two results: 5^2 = 25 7^2 = 49 The squares of any other prime numbers are either too small or too large to have two digits. (The next smaller prime number is 3, and the next larger prime number is 11.)

9 isn't prime, but one three-digit multiple of 18 is 108.

The largest 3-digit number is 999 and sqrt(999) = 31.61 approx. So try all prime factors up to and including 31.

269

11, 47, and 71

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