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13. Find the sum of all three digit natural numbers, which are multiples of 11.
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Answers
Answered by
1
Answer:
10989
Step-by-step explanation:
mark the brainliest plz
Answered by
1
Step-by-step explanation:
110,121,132,....,990
Tn=999
110+( n–1)×11=990
11n+99=990
11n=891
n= 81
So now
Sn= 81/2(110+990)
= 81/2×1100
=81×550
=44550
Hope my answer will help u if yes then please mark me as brainliest
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