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CBSE Class 10 Answered

how many three-digit number divisible by 7?
Asked by Abhinav Mohan Mishra | 05 Feb, 2014, 04:08: PM
answered-by-expert Expert Answer
Dear Student
 
smallest three digit number divisible by 7 is 104
7(a)=104
largest three digit number divisiible by 7 is 994
7(l)=994
 
an=a+(1-n)d
994=105+(n-1)7
889=7(n-1)
n-1=127
n=128
 
There are 128 three-digit numbers divisible by 7.
 
 
 
 
Thanks and Regards 
Toppers Team
Answered by | 05 Feb, 2014, 05:53: PM

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