Not enough information.
It is a number grid that only contains prime numbers.
74 of them.
The answer depends on which numbers are in the grid!
Numbers with more than two factors are not prime numbers
use a prime grid it might help
I am assuming you are referring to a normal 3x3 sudoku grid, where you can only use the numbers 1-9 once in the grid, and by prime number you mean the 3digit number across and down the grid must be prime? For a number to be prime, it must end in 1, 3, 7 or 9. There are 5 places on the Sudoku grid for a number to finish and as you can only use a number once in sudoku you have one place left where the number can not be prime. This means the most you can have is 5 prime numbers.
One method for finding prime numbers is called the "Sieve of Eratosthenes" because it basically "sifts" through the numbers looking for numbers that are not not prime.
when i did this problem i was doing a eratosthenes sieve method and the numbers was from 1-100 so i got the longest string of consecutive composite numbers on the grid are 74-82 this should be right. BTW I'm 13 doing my moms college work Sorry, but 79 is a prime number. I got 90~96
The answer depends on what value C has.
Work It Out By Drawing A Grid, Eliminate the 2 Times Tables, Then 3, Then 5, Then 7, Then 11, Then 13, And All The Primes, And Your Be Left With The Higher Prime Numbers :D
it looks like a 100 square grid with 1 to 100 and you highlight all the prime numbers
101