1.

How many three-digit numbers are division by 7.

Answer» 128 is the correct answer.
Thanks
an = a + (n-1)d a is 105D is 7 and an = 994994 = 105 + (n-1)7889÷ 7 = n-1127 =n-1128 = n
Refer to ncert ch-5 A.P
128
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