How many numbers between 25 and 400 are exactly divisible by 10? Find their sum.
Nonsense will be report
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How many numbers between 25 and 400 are exactly divisible by 10? Find their sum.
Nonsense will be report
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Answer:
38
Step-by-step explanation:
400=30+(n-1)10
400=30+10n-10
400=20+10n
400-20=10n
380=10n
380/10=10n/10
38=n
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