# math

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

• math -

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.

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