math
posted by makeeda on .
which of the following numbers is not divisible by 9?
a)81
b)162
c)199
d)1125

Do you know what divisible even means. Divisible means dividable. Try to divide all those numbers by 9.
a)81 = 81/9 = 9
b)162 = 162/9 = 18
c)199 = 199/0 = 22.11111..
d)1125 = 1125/9 = 125
From this you can see that the only number which is not divisible by 9 is 199.