Question 1046566: How many natural numbers upto 990 are divisible by 5 and 9 both but not by 7 ? Answer by ikleyn(52872) (Show Source): You can put this solution on YOUR website! .
How many natural numbers upto 990 are divisible by 5 and 9 both but not by 7 ?
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= 22 natural numbers are divisible by 5 and 9 both.
Of them, 3 are divisible by 7: 45*7 = 315, 2*(45*7) = 630, and 3*(45*7) = 945.
22 - 3 = 19.
Answer. 19 natural numbers.