# How many three digit number are there,which leaves a reminder 3 on division by 7

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Since, all the numbers between 100 and 999 which are divisible by 7 and leaves the remainder 3 are in AP, where, a = 101, l = 997 and d = 7. Hence, there are 129 numbers between 100 and 999 which are exactly divisible by 7 and leaves the remainder 3

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