How many positive multiples of 7 that are less than 2000 end with the digit 8?
The smallest multiple of 7 end in 8 ==28
The largest multiple of 7 ending in 8=1988
Every number beginning with 28 + 70 ==multiple of 7 ending in 8
[1988 - 28] / 70 + 1 ==29 multiples of 7 that end end in 8 between 1 and 2000.
