Ask a New Question

how many two-digit primes have

This is a riddle, and I'm supposed to find a 5-digit number from it.....My thousand's digit is the first that is perfect, but if
1. 0 answers
2. asked by Catherine
3. 727 views
This is a riddle, and I'm supposed to find a 5-digit number from it.....My thousand's digit is the first that is perfect, but if
1. 0 answers
2. asked by Peter
3. 1,187 views
The digits 1,2,3,4,5,6,7,8,9 are used to form four two-digit prime numbers, with each digit used exactly once. What is the sum
1. 1 answer
2. asked by ooooookkkkkk
3. 851 views
how many two-digit primes have a ones digit of 1????????????????????got no clue
1. 7 answers
2. asked by amad
3. 4,590 views
URGENT HELP!Squares into PrimesSome primes can be expressed as the sum of two squares, as in 13=2^2+3^2; some can't:7=/=a^2+b^2.
1. 1 answer
2. asked by Sara
3. 1,273 views
For how many two-digit primes is the sum of the digits equal to 8?
1. 2 answers
2. asked by Ella
3. 1,112 views
what percent of the two digit whole numbers are primes ?1.21 2.23 3.25 4.29? explain the ans
1. 2 answers
2. asked by tasu
3. 418 views
Two consecutive odd primes, such as 11 and 13, are called a pair of "twin primes" how many pairs of twin primes are there
1. 1 answer
2. asked by anonymous1
3. 1,414 views
three consecutive primes are summed. when the sum is squared, the result is 72,361. what is the largest of the three primes?
1. 1 answer
2. asked by shaun
3. 2,886 views
Two of the many conjectures involving primes are given in exercises 36 and 37.36. The mathematician Christian Goldbach
1. 1 answer
2. asked by Kyleigh
3. 115 views