Question

How many positive integers less than 1000 are divisible by 7

Answer 1

==>the number of positive integers less than 1000 that are divisible by either 7 or 11 is 142 + 90 - 12 = 220.
==>the number of positive integers less than 1000 that are divisible by exactly by one of 7 and 11 is 220 - 12 = 208.


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Answer 2

Answer:

There are 142 terms

Step-by-step explanation:

a=7

d=7

An=994

An=a+(n-1)d

994=7+(n-1)7

987=(n-1)7

n-1=141

n=142