How many 3-digits numbers are there which are completely divisible by 6?
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The first three digit which is divisible by 3 is 102
A.P. = 102,108.....996
Let An =996
a +(n-1)d=996
102+(n-1)6=996
6(17+(n-1) )=996
17+n-1=996/6
16+n= 166
n = 166-16
n = 150
Therefore there are 150 number
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