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Earn +20 ptsQ: A prime number whose digit sum is 7?
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What is a 2-digit number and a prime number and the sum of its digits is 13?
67
The sum of my ones and tens digit is 10. My tens digit is greater than my ones digit. i am a prime number what number am i?
16
What is the sum ratio of the number of one digit prime numbers and the number of one digit composite numbers?
There are four of each.
Two prime numbers between 100 and 199 such that the tens digit is a prime number and the tens and ones digit taken together are a 2 digit prime number find the sum of these two prime numbers?
For the tens digit to be a prime number then it must equal 2, 3, 5 or 7. There are four 3-digit prime numbers that fit the above condition and also have the tens and units digits forming a 2-digit prime number. 131, 137, 173, 179. The person supplying the question may like to sum the various combinations.
What twin prime number whose sum is 84?
61 and 23.
Related questions
A prime number whose digit sum is 8?
17, 53, 71
What is the sum of all 2-digit multiples of 7 whose digits sum to a prime number?
-5
What is a two digit prime number with each digit a prime number and the sum a prime number?
23
What 2-digit prime number has a sum of 10 when you add up its digits?
Two-digit prime numbers whose digits add up to 10 are:193773
What 2 digit number less than 40 is divisible by 1 prime number whose sum is a prime and whose difference is a prime?
29 is the answer. 29 is prime. 2+9=11 which is prime. 9-2=7 which is prime.
What is the greatest 3 digit number whose digit have a sum of 12?
930
What is a 3 digit whole number whose digit product equals the digit sum?
123
What is the sum of 3 largest 2 digit prime number?
The 3 largest 2 digit prime numbers are 83, 89, and 97. The sum is 269
What two digit number has three different prime factors whose sum in also twelve?
2 x 3 x 7 = 42
Is 261 a prime number whose sum is 57?
No.
Two -digit number whose cube root is the square root of the sum of its digit?
27
What is a 2-digit number and a prime number and the sum of its digits is 13?
67
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