Once your kids have seen how the first primes are found, the easiest way for them to tell whether a number is prime or not is to be able to reference a chart even if they only write the first 12 to 25 in their books.Prime numbers are completely divisible by 1 and themselves, which means there are no remainders upon division by 1 and the same number. Considering the numbers from 1 to 10 we have four prime numbers.
