how many even integers n,where 100 ≤ n ≤ 200 are divisible neither by seven nor by nine?
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Total 51 even integers
Out of which 7 will be divided by 7 and 6 will be divided by 9
(for 7..find intervals of 14 as we are taking even numbers
112,126...196
(for 9..find intervals of 18 as we are taking even numbers
108,126...198)
126 is common
So, 51-7-6+1 = 39 will not be divided by 7 or 9
Out of which 7 will be divided by 7 and 6 will be divided by 9
(for 7..find intervals of 14 as we are taking even numbers
112,126...196
(for 9..find intervals of 18 as we are taking even numbers
108,126...198)
126 is common
So, 51-7-6+1 = 39 will not be divided by 7 or 9
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