Find the valve of x if the following three numbers are in Gp. a. x+9,x+3, x
b. x-5, x+1, x+5
c. 2x,2x+3, 2x+9
d. 3x, x+6, 3x+8

1000, 2000, 3000, etc are the 4-digit numbers which when divided by 1000, give whole number answer.

Step-by-step explanation:

Scott divides some 4- digit numbers by 1000 and his answer is a decimal every time.  

From this Scott has concluded that if you divide a 4-digit number by 1000, then the answer will never be a whole number.

I think Scott is wrong and the reason is that if we try to divide those 4-digit numbers which are multiples of 1000, i.e. 1000, 2000, 3000, 4000, ... etc. with 1000 then only you will get a whole number answer. (Answer)