32 slides Choose a number, multiply the last digit of the number to 2 then add the product formed by the remaining digitsThese are the following steps used in doing the math investigation: 1. GATHERING ANDRECORDING DATA2. MAKING A CONJECTUREThe number chain has all the whole numbers from 1 to 18Choosing 19 will give you only one number in its chain which is 19 itself Numbers greater than 19 is followed by the numbers included in the number chain depending on which number you choose. These number