find the number of numbers between 1to 460 that are odd and divisible by 7
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First no. divisible by 7 is 7 itself. a1=7
Last no. divisible by 7 is 455. an=455
d=7
no. of no.s divisible by 7, ie, n=?
an=a1+(n-1)d
455=7+(n-1)7
448=(n-1)7
n-1=64
n=65 . No. of no.s b/w 1 and 460 divisible by 7 are 65.
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