Find the number of integers between 100 and 1000
1) divisible by 7
2) not divisible by 7
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1) divisible by 7 till 100 = 100/7 = 14
divisible till 1000= 1000/7 = 142
Total no. of multiples between 100 & 1000= 142-14 = 128
2) Nos. Between 1000&100 = 1000-100 =900 +1 = 901
Nos which are not multiples = 901-128 = 773
divisible till 1000= 1000/7 = 142
Total no. of multiples between 100 & 1000= 142-14 = 128
2) Nos. Between 1000&100 = 1000-100 =900 +1 = 901
Nos which are not multiples = 901-128 = 773
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