+118730 +118730 +118730 +118730 Не по теме
+118730 +118730 +118730 +118730 +118730 Не по теме
+118730 Не по теме
#13
+118730 ok that makes it easy for me.
Sometimes i will try to pitch a little lower because I think some of the other forum users also like to look and understand.
Think of any large number but break it into 2 pieces 10x+y where x and y are positive integers (whole numbers) and x can't be 0, y is less than 10
When you take the last digit off you are left with x
now you want (10x+y) / x to be a whole number
(10x+y) / x = 10 + y/x
so y/x has to be a whole number
y=0 will always work
If x >= 10 then y has to be 0
If x <10 then y has to be 0 or a multiple of x
So
If x = 9 y=0 or 9 90 or 99
If x = 8 y = 0 or 8 80 or 88
If x=7 y=0or 7 70 or 77
If x=6 y=0 or 6 60 or 66
If x=5 y=0 or 5 50 or 55
If x=4 y=0 or 4 or 8 40, 44, 48
If x=3 y=0,3,6,9 30,33,36,39
If x=2 y=0,2,4,6,8 20,22,24,26,28
If x=1 y can equal any single digit number
so we have
All double or more digit numbers that end in 0 plus
99,88,77,66,55,44,48,33,36,39,22,24,26, 28,19,18,17,16,15,14,13,12 and 11
How's that
That is all of them!
