circle the first available prime number, cross out all of its multiples on the chart and repeat tat procedure over and over again. The next number that has not been crossed out is the next prime number. Numbers
If the last digit of a number is 2 or 6, and the next-to-the-last digit is odd, then the whole number is divisible by 4. If the last digit of a number is 0, 4, or 8, and the next-to-the-last digit is even, then the whole number is also divisible by 4. 1792 will allow...
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