Question 857442
The average of 9 consecutive numbers is 20, therefore the sum is 9*20 = 180
let x be the first number, then
x+(x+1)+(x+2)+(x+3)+(x+4)+(x+6)+(x+7)+(x+8) = 180
9x+36 = 180
9x = 144
x = 16
our numbers are
16, 17, 18, 19, 20, 21, 22, 23, 24
the largest number is 24