1. Draw the flowchart to do the following old problem: Mix up the serial number on a dollar bill. You now have two numbers, the original serial number and the mixed-up one. Subtract the smaller from the larger. If you add the digits of the answer, you will obtain a 9 or a number larger than 9; if it is larger than 9, add the digits of this answer again. Repeat the process until you obtain a single digit. What is that digit?

2- What is the sum of the first of the first consecutive odd numbers? (dont use a ready formula).

3- Consider the following pattern: 9 x 1 1 = 8 9 x 21 1 = 188 9 x 321 1 = 2,888 9 x 4,321 1 = 38,888 a. Use this pattern and inductive reasoning to find the next problem to find the next problem and the next answer in the sequence. b. Predict the answer to 9 x 987,654,321 1 c. Predict the answer to 9 x 10,987,654,321 1