How many numbers from 11 to 50 are there whic | vedclass

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(B) First,find the numbers between $11$ and $50$ that are divisible by $7$.The multiples of $7$ in this range are: $14, 21, 28, 35, 42, 49$.There are

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Four

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(B) First,find the numbers between $11$ and $50$ that are divisible by $7$.The multiples of $7$ in this range are: $14, 21, 28, 35, 42, 49$.There are $6$ such numbers.Next,identify which of these are also divisible by $3$ (i.e.,multiples of $21$).The numbers divisible by both $7$ and $3$ are $21$ and $42$.To find the numbers divisible by $7$ but not by $3$,subtract the common multiples from the set of multiples of $7$.Required numbers = ${14, 28, 35, 49}$.Therefore,the count of such numbers is $4$.

How many numbers from $11$ to $50$ are there which are exactly divisible by $7$ but not by $3$?

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