Question

how many three digit numbers are there which leaves a reminder three on division by seven

Answer 1

Answer:

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Step-by-step explanation:

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