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CBSE Class 11-science Answered

How many integer btw 81 to 1000 divisible by 3. Also tell the trick to find the last no. Divisible by 3,4 BTW 81 to 100
Asked by futureisbright051101 | 14 Dec, 2017, 02:30: AM
answered-by-expert Expert Answer
begin mathsize 16px style 1000 over 3 space will space give space reaminder space 1
so space the space last space number space divisible space by space 3 space is space 1000 minus 1 equals 999
its space is space an space AP
81 comma 84 comma........ comma 999
last space term space comma space common space difference space and space first space term space is space known
find space straight n equals number space of space terms
straight a subscript straight n equals straight a plus open parentheses straight n minus 1 close parentheses straight d end style
Answered by Arun | 15 Dec, 2017, 12:20: PM
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