Question: 2. How many patterns can you make with 2 digits, followed by a letter, followed by a digit, if your pattern cannot start with 0?

2. How many patterns can you make with 2 digits, followed by a letter, followed by a digit, if your pattern cannot start with 0? 3. We place 561 points on the circumference of a circle. How many cords of the circle do these points make? 1

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