The digital root of a number is the number obtained by repeatedly addinga the digits of the number. If the answer is not a one-digit number, add those digits. Continue until a one-digit sum is reached. This one digit is the digital root of the number. For example, the digital root of 98 is 8, since 9 + 8 = 17 and 1 + 7 = 8. Record the digital roots of the first 30 integers and find as many patterns as you can. Can you explain any of the patterns?