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UPSC NDA II 2025 Mathematics Paper

Question Numbers: 23-24

For the following two (02) items:

Let

p = \sum\limits_{j = 1}^{n} \log_{10} 2^{j} \text{ and } q = \sum\limits_{j = 1}^{n} \log_{10} 5^{j}

Question : 24 of 120

Marks: +1, -0

If p + q = 15 then what is equal to? q - p

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