How many numbers are there from 300 to 650 which are completely divisible by both 5 and 7?
the numbers which are divisible by both 5 and 7 means those must be divisible by 5X7=35
35th multiple after 300 = 315 = 35*9
35th multiple before 650 = 630 = 35*18
so total numbers which are divisible by 35 in between 300 & 650 are = 18-9+1 = 10.
so the answer is option C.
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