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Recent questions tagged arithmetic-series

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GATE Electrical 2019 | GA | Question: 6
How many integers are there between $100$ and $1000$ all of whose digits are even?$60$$80$$100$$90$
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GATE Electrical 2013 | Question: 65
Find the sum to $n$ terms of the series $10+84+ 734 +\dots $$\dfrac{9(9^n+1)}{10}+1 \\$$\dfrac{9(9^n-1)}{8}+1 \\$$\dfrac{9(9^n-1)}{8}+n \\$$\dfrac{9(9^n-1)}{8}+n^2$
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