How many three digits number are divisible by 7
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128 ans
It will form an a.p like 105,112,………..994 So by formula of nth term a+(n-l)d ,where a is the 1st term,n is no.of term,d is common difference ,so,105+(n-1)7=994,so by solving we get n= 128,therefore three digit no. divisible by 7 is 128.