1.How many different integers represent the sum of two or more members of the set{-4,-3,-2,-1,0,1,2,3,4}? 2.Find the number of five-digit numbers less than 40 000 in which the three-digit numbers formed by a consecutive digits are all divisible by either 17 or 23. Remember, zero cannot be the first digit in a three-digit number.
Please show grade 7 math work.
This is hard but I will give lots of points.