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How many of the three digit numbers that can be made from all of the digits 1 3 and 5 (used only once each) are prime?
Wiki User
∙ 7y ago
None - since the digits used - when added together divide exactly by three. 1+3+5=9... 9/3=3. This means that ANY of the numbers created can be divisible by three.
Wiki User
∙ 7y ago
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How many three digit numbers is average of three digits equal to 2?
21
How many three digit numbers have the sum of their digits equal to 22?
21.
What are positive 3-digit numbers?
Positive 3-digit numbers are any numbers between 100 and 999. They are not negative (no "-" sign in front) and are three digits.
What is the smallest three-digit number divisible by the first three prime numbers and the first three composite numbers?
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.
How many three digit numbers can be formed using the digits 0 to 9?
There are 900 of them.
What three prime numbers multiplied equals to a 200 hundred digit number?
Any prime numbers of about 66 or 67 digits will do.
What are the largest three digit prime number whose digits are all primes?
The largest three digit prime number whose digits are all primes is 773.
What are the first three emirp numbers?
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
How many three digits are there in all?
There are 900 three-digit numbers.
What are the the 3 digit numbers using 1345678?
Using the digits of 1345678, there are 210 three digit numbers in which no digit is repeated.
10.) A two-digit number is prime. When you reverse the digits, that number is also prime. What could the number be List three possibilities.?
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
How many 3 digit numbers can be formed from the digits 357 with any digit repeated?
27 three digit numbers from the digits 3, 5, 7 including repetitions.
Explanation for the answer to how many three digit prime numbers can be formed using only odd prime digits and digits may be used more than once?
The odd prime digits are 3, 5, and 7. but the final digit of your three-digit prime number can't be 5. So there are only 18 combinations to check. You can list these numbers and start going through them to see which are prime. The easiest test is divisibility by 3 (sum the digits) and that quickly eliminates 7 of them. You are left with:337353373533553x557577733737x757773Of these, only two are not prime. I marked them with an "x". I used a table of primes to find these and don't know an easier way.
How many three digit numbers have no repeated digits?
757
What three digit prime number has all prime digits and forms primes with its first two and last two digits?
373
How many 3 digit number can be made using the digits 2 4 7 9?
24 three digit numbers if repetition of digits is not allowed. 4P3 = 24.If repetition of digits is allowed then we have:For 3 repetitions, 4 three digit numbers.For 2 repetitions, 36 three digit numbers.So we have a total of 64 three digit numbers if repetition of digits is allowed.
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?
There are 17 such numbers.
