find the sum of all counting numbers between 100 and 500 which are divisible by 9.. spams will be reported...
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find the sum of all counting numbers between 100 and 500 which are divisible by 9.. spams will be reported...
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Answer:
108~495
495-108=387
387÷9=43
43+1=44
(108+495)×44÷2=13266←answer